Buzzin Flashcards

(226 cards)

1
Q

colonizing oral cavity?

A
  1. strep mutans
  2. prevotella intermedia, porphyromonas gingivalis
    late: actinomycetem comitans
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2
Q

PAS stain

A

pseudohyphae, oral candidiasis

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3
Q

Tzanck smear, multinucleated cells

A

HSV

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4
Q

lesion in mouth thats bleeding

A

pyogenic granuloma

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5
Q

what is white and won’t scrape off?

A

hairy leukoplakia - see hyperparakeratosis w/ balloon cells - think EBV

Luekoplakia = premalignant lesion

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6
Q

Tobacco SCC?

A

p53 and NOTCH

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7
Q

pink squamous cells and mucin making cells neoplasia in mouth?

A

mucoepidermoid carcinoma

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8
Q

perineural invasion in mouth?

A

adenoid cystic carcinoma

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9
Q

polyhydramnios

A

think atresia

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10
Q

double bubble sign?

A

duodenal atresia - 30% have trisomy 21

also think annular pancreas

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11
Q

air in stomach on CXR?

A

think fistula

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12
Q

weak posterior/lateral aspect of diaphragm?

A

diaphragmatic hernia

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13
Q

high AFT levels in amniotic fluid

A

think omphalocele (OLDMA) or gastroschisis (YMA)

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14
Q

defect in anterior abdominal wall?

A

gastroschisis

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15
Q

why meckels?

A

failed involuation of vitelline duct

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16
Q

appendicitis you think….

A

maybe meckels in young kids!

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17
Q

projectile non bilious vomiting

A

pyloric stenosis

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18
Q

hirschsprung disease

A

megacolon! - see bilious vomiting

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19
Q

acquired megacolon?

A

chagas disease

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20
Q

pyrosis

A

heartburn

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21
Q

odynophagia

A

pain w/ swallowing

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22
Q

achalasia

A

increased tone of LES

secondarily due to chagas disease: trypanasoma cruzi

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23
Q

hiatal hernias

A

sliding = upper part of stomach –> diaphragm

rolling: upper fundus slids up esophagus

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24
Q

zenker diverticulum

A

pouches of esophagus due to increased pressure

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25
mallory-wess laceration
retching/violent vomiting = lengwise tears
26
boerhaave syndrome
perforation of esophagus due to increased pressure
27
barrets
metaplasia (replacement): squamous cell to intestinal glandular mucosa w/ goblet cells ADCA risk - length is most imp. risk factor >3cm
28
+mucicarcmine staine
ADCA
29
middle third of esophagus
SCC
30
mets of cancer in upper third esophagus?
cervical LNs
31
cancer in middle esophagus spread?
SCC - mediastinal, paratracheal,, tracheobronchial nodes
32
cancer in lower third esophagus?
think ADCA - spread gastric/celiac nodes
33
curling stress ulcer?
burns/trauma - proximal D
34
Cushing stress ulcer?
intracranial disease - see gastric, duodenal, esophageal ulcers
35
where's h. pylori?
antrum / duodenum | spiral shaped, curved bacilli
36
chronic inflamm. of fundus?
AI diseae
37
chronic inflamm. or whole stomach?
drugs/alcohol
38
antral gastritis w/ high acid production, no hypergastrinemia
H pylori
39
+ ammonia in breath
due to urease in H. pylori infection
40
cancer assoc. w/ h pylori?
ADCA, MALT lymphoma
41
body/fundus gastritis w/ hypergastrinemia?
AI gastritis AutoAbs to parietal cells and IF - loss of parietal cells
42
achlorhydria
defective gastric acid secretion
43
oxyntic
acid producing mucosa - parietal cells
44
air under diaphragm in CXR?
think PU that punctured through stomach
45
hematochezia
bright red blood in stools
46
EGD
upper GI endoscopy
47
hypertrophic gastropathies?
metetrier disease: xs secretion of TGF alpha: body/fundus ; w/l diarrhea, Peripheral edema ZE syndrome : gastrin secreting tumor - see chronic diarrhea , multiple peptic ulcers
48
epithelial dysplasia in gastric tumor?
benign gastric adenoma/ a type of polyp
49
virchows node/ sister mary joseph node, axillary/irish node?
think gastric adenocarcinoma
50
two types of gastric adenomas?
1. Intestinal type (non signet ring) - usual type - assoc. w/ H. pylori APC/WNT pathway - occur in gastric antrum/pulorus - form bulky ulcerative tumors 2. Diffuse-type (signet ring) - not assoc. w/ h. pylori germline loss of fn. in E-cadherin (CDH1 gene) - infiltrate diffusely in wall of stomach - linitis plastica
51
MALToma
marginal zone B cell lymphoma - H. pylori related arise in site of previous inflammation CD19/20 + see lyymphoepithelial lesions
52
GIST
mesenchymal gastro-intestinal stromal tumor arise from interstitial cells of cajal C-KIT/CD117 or PDGFRA mutations see spindle cell features
53
C-KIT/CD117 +
mesenchymal GIST
54
direct vs. indirect hernia?
``` direct = occur medial to epigastric indirect = lateral to epigastric ```
55
target sign on US
think intussuscpetion
56
red currant jelly stool
intussusception
57
coffee bean sign?
volvulus
58
primary vascular related GI bleeding?
Ischemic bowel disease, mural infarction, angiodysplasia, hemorrhoids
59
cocaine + abdominal pain/bloody diarrhea?
ischemic bowel disease also think CMV and E. coli
60
watershed zones?
ischemic bowel disease - think splenic flexure, sigmoid colon, rectum ** most often colon!!!
61
dysentary
painful bloody diarrhea
62
secretory diarrhea
persist during fasting - think infectious; viral or enterotoxin
63
osmotic diarrhea
hypertonic fluid - abates w/ fasting - think lactase defic.
64
exudative diarrhea
due to mucosal damage --> purulent bloody stoools that persist w/ fasting - think bacterial or IBD
65
malabsorptive diarrhea
abates w/ fasting : see improper absorption --> bulky stools w/ xs fat ex. celiac, giardia, CF, chronic pancreatitis
66
genetics of celiac?
HLA-DQ2/DQ8 diffuse/severe blunting of villi in D/J malabsorption
67
dermatitis herpetiformis
subepidermal blistering of skin seen in 10% of celiac pts.
68
IgA anti-transglutaminase Ab
seen in Celiacs
69
MTP gene
mutated in abetalipoproteinemia:
70
oil red-o stain
abetalipoproteinemia:
71
acanthocytic red cells/ burr cells
abetalipoproteinemia:
72
guillan barre syndrome
campylobacter enterocoloitis most common bacterial pathogen in developed countries and travelers diarrhea see watery/blood diarrhea
73
bloody diarrhea, fever, ab. pain
shigellosis
74
rose spots
maculopapular rash on chest and abdomen - typhoid fever - salmonella typhi may mimic appendicitis
75
ETEC
watery/secretory noninflamm. diarrhea
76
EHEC
O157:H7 --> HUS + bloody diarrhea
77
EIEC
dysentery
78
EAEC
nonbloody diarrhea, prolonged in AIDS
79
tropheryma whipplei
Whipple disease - se w/l, diarrhea/steatorrhea, and polyarthritis see dense accum. of foamy macrophages in SI lamina propria --> accumulate in nodes and joints ** only one affecting lymphatic transport
80
which kills many children every year?
rotovirus - causes severe wtery diarrhea
81
AIDS/diarrhea
thik cryptosporidium spp. also MAI - can detect w/ acid fast stain
82
amebiasis
dysentery and liver abscess - caued by entamoeba histolytica seen in india, mexico, colombia --> go to liver, brain and lungs
83
giardia
deacreased expression of brush border enzymes --> steatorrhea
84
pANCA
some UC
85
ASCA
some CD
86
starts on cessation of smoking
UC
87
UC
colon and rectum --> retrograde, no skips mucosa/submucosa - superficial broad based ulcers can cause megacolon and pseudopolyps NO granulomas/strictures bloody mucoid diarrhea risk of ADCA
88
CD
``` regional enteritis unaffected, skip areas transmural linear mucosal ulcers - deep ulcers granulomas!!! fissureing/fistula creeping fat relatively mild diarrhea, ab. pain, RLQ (ileocecal) *** erythema nodosum ADCA fat + vit malabsorption ```
89
sessile
flat
90
pedunculated
polyps w/ stalk
91
hyperplastic polyps
sessile - no malignant potential - most common
92
inflammatory polyps
seen in chronic IBD - see rectal bleeding ad mucus discharge - not malignant
93
hamartomatous polyps
pedunculated - think PJ syndrome of juvenile polyposis
94
mutated STK11
Peutz-Jeghers syndrome - see hamartomatous polyps, mucocutaneous hyperpigmentation increased risk of cancer
95
SMAD4, BMPR1a mutations
think juvenil polyposis age <5 see hamartomatous polyps - congenital malformations - digital clubbing - cancer by age 50
96
adenomas
neoplastic polyps that are not yet malignant - size >4cm has increased malignancy
97
APC gene mutation
Familial adenomatous polyposis - see numerous adenomas >100 to make ddx colon cancer by age 30 if not treated autosomal dominant
98
MLH1, MSH2 , microsatellite instability due to repair gene defect
think hereditary non-polyposis colorectal cancer HNPCC see sessile serrated adenomas autosomal dominant right sided ADcarcinoma - mucinous subtypes + endometrial cancer
99
mucinous ADCA
predominantly on right side - has to do with DNA mismatch repair genes or hypermethlaition: MSH2, MLH1, BRAF --- think HNPCC or sporadic colon cancer
100
left sided ADCA?
think typical tubular/villous ADCA with APC/WNT pathway defect change in bowel habits, rectal bleding, melena, LLQ pain : presents w/ obstruction and is caught more quickly
101
right sided ADCA?
presents w/ fatigue, w/l, anemia : they don't often present w/ obstruction mucinous ADCA due to MSH2, MLH1, BRAF mutations and DNA mismatch repair problems
102
where does colon ADCA met to?
regional LNs, lungs, bones, liver *** most common
103
well differentiated neuroendocrine tumor?
carcinoid tumor ** midgut most aggressive carcinoid syndrome = serotonin release - episodic skin flushing, diarrhea, bramping, asthma
104
zones of rectum?
upper zone = columnar epi. (see ADCAs) middle zone = transitional zone = cloacogenic carcinoma (behaves like SCC but doesn't make keratin) lower zone = squamous epi. - see condyloma papilliform - HPV 16/18, mutated E6/E7
105
anal fistulas assoc. w/?
CD
106
lymph drainage above dentate line?
perirectal and paravertral nodes
107
lymph drainage below dentate line?
superficial inguinal /femoral nodes
108
toxin of H. pylori?
Vacuolating cytotoxin (VacA) causes cell injury characterized by vacuolization. Another H. pylori gene from a pathogenicity island encodes cytotoxin-associated antigen (CagA) and is present in many patients with chronic gastritis and peptic ulcers and increases their risk for gastric cancer.
109
leather bottle stomach
diffuse gastric ADCA - signet rings are seen
110
cobblestone appearance of gastric mucosa
leather bottle stomach - diffuse gastric ADCA - signet rings are seen
111
Sclerosing cholangitis associated w/ what?
UC sometimes CD
112
Diarrhea with mucus and blood in the stools
Shigella dysenteriae and Entamoeba histolytica. with E. histolytica can see liver abscess
113
ompeprazole + Upper GI endoscopy reveals 3 circumscribed, round, smooth lesions in the gastric body from 1 to 2 cm in diameter. Biopsies are taken and microscopically show the lesions to consist of irregular glands that are cystically dilated and lined by flattened parietal and chief cells. No inflammation, H. pylori, metaplasia, or dysplasia is present.
fundic gland polyps
114
typhoid fever
Salmonella typhi abdominal pain and diarrhea during week 1 of their illness. By week 2, these patients had splenomegaly and elevations in serum AST and ALT levels. By week 3, they were septic and had leukopenia. At autopsy, the patients who died were found to have ulceration of Peyer's patches.
115
centrilobular
zone 3 - acetiminophen toxicity
116
periportal
zone 1
117
microvesicular steatosis?
pregnancy, Reye syndrome, tetracycline/salicylate toxicity, alcohol
118
macrovesicular
obesity, diabetes, hep C, EToH
119
skin/body changes of chronic liver failure?
jaundice, palmer erythema, spider angiomata, terry nails, finger clubbing, "fector hepatis"" - sweet/musty breath, edema/ascities, hypogonadism/gynecomastia
120
asterixis
hepatic enceophalopathy - "flapping" tremor of hands - jerky irregular flexion patterns - due to ammonia accumulation and liver failure
121
macronodular cirrhosis
think viral
122
micronodular cirrhosis
think ethanol
123
causes of liver cirrhosis?
hep C * most common alcohol * also really common hep B* sometimes
124
mediators causing myofibroblast transformation?
PDGF (migration of stellate cells) and TNF activates stellate cells TGF beta --> stimulates fibrinogenesis in myofibroblasts stellate cells secrete VEGF/ANG1 --> vascular remodeling
125
portal HTN?
due to liver cirrhosis - b/c of fibrosis and sinusoidal remodeling of myofibroblasts --> intrahepatic vascular reistance pre-hepatic: portal occlusion Intra-hepatic: due to liver cirrhosis: alcohol + hep post hepatic: RSHF, hepatic v. outflow obstruction see varices, ascites, congestive splenomegaly, heptic encephalopathy
126
high protein ascities?
TB, carcinoma = exudate
127
low protein ascites?
transudate = albumin loss
128
eruptive xanthomas, pruritis, jaundice
think cholestasis - inability to excrete bile - backs up showing jaundice no bile salts to break down fats --> cholesterol retention and xanthomas bile salts deposit in skin --> pruritis
129
UDP
uridine diphosphatase = conjugates/ makes direct bilirubin
130
choluria
dark colored urine - due to bilirubin excretion
131
rotor/DJ syndrome
mpaired biliary excretion of bilirubin glucuronides is due to a mutation in the canalicular multidrug resistance protein 2 (MRP2) see elevated conjugated bili/jaundice w/out AST/ALT elevation DJ has black liver
132
high unconjugated bili levels?
think Gilbert/Crigler Najar - due to UDP problems
133
AST/ALT
meausres hepatocyte membrane disruption ALT found in liver most common cause of just ALT/AST elevation = NASH higher AST/ALT ratio is likely ETOH see very high levels w/ viral infection
134
ALK Phos and GGT
induced enzymes - think biliary things seen w/ cholestasis and EtOH isolated elevated GGT = EtOH isolated ALK Phos: must rule out bone and placenta
135
high IgA
alcoholic liver disease
136
diffuse hypergammaglobulinemia?
cirrhosis, AI hep
137
IgM high
primary biliary cirrhosis
138
IgG high
AI hep
139
Hep A
F-O contamination 1 mos. incubation third world epidemic - shellfish in US ACUTE ONLY - does not cause chronic disease see spike in fecal HAV see anti-HAV Ab in those having had vacc. see IgM- anti-HAV after 1 month in those that have been infected
140
Hep B
ACUTE and CHRONIC (only minority go to chronic) - horizontal transmission: sex most common - vertical: seen in Asia! - 5% progresses to chronic hepatitis, 1% of total gets cirrhosis, .5% of total gets hepatocellular carcinoma 3 mos incubation histo: "gorund glass appearance" of HBsAg portal inflatmmion, apopostis w/ acidophil bodies
141
Dane particles
incomplete dsDNA - think HBV
142
indicative of active infection of HBV?
HBsAg
143
Acutely infected w/ HBV?
see HBsAg, IgG Anti-HBc, IgM Anti-HBc****
144
chronically infected w/ HBV?
see HBsAg, IgG Anti-HBc - don't see Anti-HBc IgM!!!
145
what shows if pt. has ever been infected w/ HBV?
IgG Anti-HBc
146
what shows if pt. has only had HBV vaccination and never been infected?
IgG Anti-HBs - shows immunity to HBV
147
only thing present during window period indicating acute infection?
IgM - anti-HBc won't see anything during 3 mos. incubation gap
148
chronicity of Hbv?
persistence of HBsAg for more than 6 mos, along with HBeAg and HBV-DNA ::: see it waver
149
what denotes high infectivity of HBV?
presence of HBeAg and high levels of HBV DNA
150
what is best indcator of chronicity of HBV?
age - younger age at time of infection = larger chance of increased chronicity
151
#1 cause of cirrhosis in US?
Hep C
152
Hep C
ACUTE and CHRONIC!!!! - most parenteral transmission 2 mos incubation no vaccine - genome is unstable see HCV RNA - in case of infection - stays w/ chronicity see anti-HCV in case of resolution * * most common cause of Hep C = Stable chronic hepatitis (not cirrhosis) * * only 15% of total go to cirrhosis Histo: portal inflammation, bridging fibrosis, lobular inflammation
153
Hep D
Acute infection 3 mos incubation parenteral Absolutely dependent on HBV infection --> superinfection or co-infection
154
Hep E
"hepatitis A of india" 1 mos incubation F-O route same serology as hep A: Fecal HEV seen during infection Anti-HEV Ab indicates vaccine / clearance IgM- anti-HEV - indicates infection - DDx
155
clonorchis sinensis
think cholangiocarcinomas - these are helminths
156
AMA
primary biliary cirrhosis (PBC) (a scarring of liver tissue, confined primarily to the bile duct drainage system of the liver).
157
ASMA
think AI hepatitis histology same as viral hep - see cluster of periportal plasma cells Female = Type 1 Children = Type 2 sometimes also 80% have associated high titers of various autoantibodies, including (Type 1) ANA, ASMA, but negative for AMA (Type 2) ALKM1, ACL-1* Increased frequency HLA-B8 or HLA-DRw3 60% have other forms of autoimmune disease
158
vinyl chloride
angiosarcoma
159
zone 1 hepatoxocitiy
think FE overload, Allyl alcohol
160
Zone 3 hepatoxicity
think CCl4 (carbon tetrachloride), acetaminophen, ethanol aceta: give n-acetyl cystein as antidote - toxicity due to NAPQ1 --> depletion of GSH
161
MTX
used to tx. psoriasis/ RA | see periportal fibrosis and cirrhosis
162
Isoniazid
anti-TB metabolite --> causes liver damage with increased ALT
163
alcoholic liver disease
all changes begin in zone 3 --> portal tracts 1. Fatty liver: micro/macrovesicular 2. alcoholic hepatitis: ballooning and mallory bodies - see neutrophils surrounding necrotic hepatocytes - see fever, jaundice, RUQ pain, high AST:ALT, high alk phos and GGT 3. cirrhosis
164
non-alcoholic fatty liver
metabolic syndrome; hyperlipidemia with high TG's, insulin resistance, high BP see aST cirrhosis (non alcoholic steatohepatitis)
165
C2Y82Y, H63D, TF2R
mutations in these genes --> genetic adult hereditary hemochromatosis (autosomal recessive) --> causes gene defect in HFE hepatocytes unable to recognize iron thus don't make hepcidin = iron overload! --> ** cirrhosis, bronze skin, ARTHRALGIA *** prussian blue stain ***
166
mutations in juvenile hemochromatosis?
HAMP, HJV
167
anemia of CD?
chronic inflammm -- IL6 --> activates production of hepcidin
168
Wilson Disease
high copper levels! ATP7B deficiency (controls copper excretion in bile duct) levels accumulate in liver (cirrhosis/hepatitis), brain (parkinsonian/CNS disorders), eyes (Kayser-Fleischer rings) on labs see increased urine copper
169
ATP7B deficiency
Wilson Disease- high copper levels!
170
ATP7A deficiency
Menkes disease = copper deficiency = "kinky hair disease" --> severe neuro disease
171
alpha1AT
Autosomal recessive Pizz gene mutation --> A1AT is a protease normally inhibits neutrophil elastase (this protein is made in liver --> accumulates in liver and causes disease ) seen in neonatal hepatitis and cirrhosis in 40's assoc. w/ smoking
172
causes of neonatal cholestasis?
extrahepatic biliary atresia idiopathic neonatal hep A1AT
173
PBC
primary biliary cirrhosis = cholestatis liver disease of destruction of small/medium bile ducts in liver AMA+ : directed against PCD-E2 in herings canal seen in middle aged women: pruritis and jaundice ** destruction of midde bile ducts --> periportal hepatocellular damage
174
PSC
primary sclerosing cholangitis = cholestasis w/ obliterative fibrosis of intra and extrahepatic bile ducts seen in IBD!!! UC - 90% male disease - see acute ascending cholangitis pANCA and ANA elevated!!! "beading" on ERCP and onion skin fibrosis
175
beading
PSC
176
ciliopathies
mutation in polycystin Pc1/Pc2 --> bile duct cystic changes/ fibrosis Von Meyenberg complex and caroli disease (autosomal recessive) think about ADPKD and manifestations in brain and kidneys
177
nutmeg liver
acute liver congestion at zone 3
178
budd-chiari syndrome
obstruction of more than 2 hepatic vv or IVC sen in polycythemia or clotting disorders see RUQ pain, ascites, hepatomegaly zone 3 congestion
179
HELLPP
hemolysis, elevated liver enzymes, low platelets - seen in pregnancy
180
which virus has increased risk during pregnancy?
HEV
181
nodular hyperplasia of liver
most common benign hepatic mask that isn't vascular - see central scar of stellate cells assoc. w/ osler-weber-rendu disease
182
Cavernous hemangioma of liver
commonest hepatic tumor/mass bleed when disrupted and are benign neoplasms
183
Hepatic adenoma
rounded smooth borders, no central scar seen in women on OC's: prone to rupture
184
hepatocellular carcinoma
think HBV, HCV, alcohol elevated AFP!!! see liver failure, cachexia, varices, hemorrhage
185
what could get mistaken as focal nodular hyperplasia?
fibrolamellar variant of hepatocellular carcinoma - seen in young females and males, not assoc. w/ HBV, HCV, or cirrhosis see single large mass w/ malignant hepatocyes
186
Klatskin tumor
arises from perihilar region of bile duct eptihelium
187
cholelithiasis
gallstones
188
5 F's
cholesterol stones - female, fat, flatulent, fertile, forty
189
stone formation?
1. Increased production/saturation → supersaturatiohn 2. Crystallization (nidus) 3. Flow (volume, turbulence) – hypomotility leads to sludge 4. Accretion (matrix/sludge) – sludge gives nidus something to crystalize on → accretion of cholesterol forming stones
190
strawberry gallbladder?
Cholesterolosis of the Gallbladder: cholesterol in mucosa - supersaturated bile and ↑mucosal uptake…can present clinically like acute/chronic cholecystitis - usually with stones (mechanism unknown if stone absent) - often called “strawberry gallbladder” o can cause gallbladder biliary pain o accumution of cholesterol in mucosa gives it the white/yellow dot background in the pattern of red
191
black pigement stones
unconj bilirubin - due to chronic hemolysis, SS, thalassemia , CD
192
brown pigment stones
bili + cholelsterol e. coli infection, liver flukes (C. sinensis )
193
cholelithiasis
stones in gallbladder
194
cholecystitis
inflamm. of gallbladder
195
choleocholithiasis
stones in bile duct
196
acalculous cholecystitis
seen in ill - HIV pts - no stones
197
+ revound, murphys sign
acute cholecystitis see necrosis, hemorrhage, inflammation/edema
198
hydrops of gallbladder
- obstruction of cystic duct without inflammation | - results in mucin filled gallbladder
199
HIDA scan
``` radioactive dye (given IV) is excreted by the liver (GB not seen in acute cholecystitis …even up to 3 hrs…stone blocks duct) a. pt injected w/ die into vein – fills gallbladder and later will be seen in small bowel – if there is obstruction then die won’t go into gall bladder and will continue into small bowel ---- + study means there is a stone ```
200
ECRP
used to evaluate the biliary tree a. tube is inserted down esophagus, into small bowel – at tip of scope there is alight to visualize the ampulla – can pass a needle into the ampulla and send it up into the biliary tree → inject die into biliary tree and examine for causes of obstruction b. can also go in a grab stones and pull them out of the ampulla of vater c. can also use ECRP to place a stent
201
acute/ascending cholangitis
• Cholangitis = bacterial infection superimposed on an obstruction of the biliary tree most often due to gallstone → ascending cholangitis - There is secondary bacterial infection…organism is typically from duodenum - E. coli, Klebsiella, enterobacter …. • Infection moves up the biliary tree into the liver bile duct system…sometimes resulting in multiple small liver abscesses • Typically causes: 1)Fever, 2)Jaundice, 3)Abdominal pain (Charcot’s Triad) - with Hypotension, Mental status changes (Reynold’s Pentad)….increased mortality – watch out! • Histology: shows inflamm. process due to stone, will see bile ducts are expanded and filled with pus → spills out into liver parenchyma and forms microabscesses and enzymes skyrock → super elevated ALT/AST
202
rokitanski -aschoff sinuses
Chronic Cholecystitis: • >90% associated with gallstones (same epidemiology) • Pathophysiology: repeated bouts of acute inflammation, chemical or bacterial • Pathology: stiff, thickened wall with variable inflammation and Rokitanski-Aschoff sinuses • R-A sinus (seen on right) = areas where gallbladder has constricted and surface mucosa is pulled down into wall • Clinical: highly variable symptoms of pain and "dyspepsia" • Pathologic findings and clinical symptoms do not correlate well • Porcelain gallbladder: chronic cholecystitis with calcified wall, higher risk of adenocarcinoma → mandatory surgery • see fibrotic thickened gray-white wall due to fibrosis and inflammation with many gallstones present in the lumen • see calcified wall prominently on the CXR/ CT scan • Have high risk for developing ADCA, MUST COME OUT!
203
cacinoma of gallbladder
• 2 Xs more common in women, peaks in 7th decade • Native Americans and Hispanics • Usually assoc. with gallstones • Rarely diagnosed preop. or when resectable – no symptoms until advanced disease – rare ddx in time • Vast majority are Adenocarcinoma • Terrible prognosis; <10% 5 year survival! • ERBB2 (Her-2/neu) overexpressed (2/3) • can results in direct liver invasion!
204
klatskin tumor
cholangiocarcinoma located at jn. or right and left hepatic ducts
205
PRSS1 mutations:
code for a variant of trypsin that is resistant to inhibitor deactivation
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pancreas divisum
ducts do not fuse - - predisposes to chronic pancreatitis o see that tail and body (dorsal portion) drains through minor sphincter through the “minor duct of santorini” o Duct of Wirsung does not develop and very little drains out of papilla of vater (when use ERCP and inject into duct of wirsung – see no flux into the pancreas, only up into the biliary tree)
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annular pancreas
- - normal pancreas encircles 2nd part of duodenum - - presents with obstruction and other developmental defects - presents with “double bubble sign” : stomach and proximal duodenum fill w/ air - see bilious green tinged vomit – due to bile still entering into the small bowel (obstruction is usually below the ampula) o – may or may not be complete obstruction, and less commonly may present later in adulthood
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defects leading to increased pancreatitis?
* PRSS1: mutated trypsinogen resistant to antitrypsin * SPINK1: SPINK 1 protein is a trypsin inhibitor * CFRT: some cystic fibrosis variants get pancreatitis
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two main causes of acute pancreatitis?
alcohol: seen in males, 40 biliary stones: seen in women, 70 - Alcohol → damage of ductule that’s producing HCO3- - Drugs → damage of acinus: CCK → zymogens, lipase, amylase
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elevated serum amylase and lipase***
DDx of Acute Pancreatitis: clinical DDX! - epigastric pain radiating to the back - fever, nausea, vomiting - elevated serum amylase and lipase*** Morphology: - Early stages: see diffuse swelling from edema with redness from vasodilation, but no necrosis - Mid stages: see areas of hemorrhage and peripancreatic fat along with fat necrosis= “saponification” - Later stages: see complete fat necrosis = complete saponification
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most common cause of chronic pancreatitis?
alcohol see excruciating pain, diabetes, ascities, fat malab, pseudocyts formation and duct obstruction
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TRUE CYST
- Have an epithelial lining. - As all epithelia secrete fluid, the cyst will continue to grow in size, and impinge on adjacent anatomical stuctures (a type of neoplasm) - Treatment must include excision of epithelium, or they will recur - Squamous cysts fill with keratin (because keratin is greasy, they were named as though the contents were fatty (i.e. sebaceous cyst of skin and cholesteatoma are misnomers) o epidermal inclusion cyst of skin, keratocyst of jaw, cholesteatoma of external ear canal/mastoid bone - Serous cysts secrete a watery clear fluid, mucinous cysts mucin
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PSEUDOCYST
- Have no epithelial lining Will not grow in size unless connected to a duct - Treatment is by drainage - examples include pancreatic pseudocyst, adrenal pseudocyst and old abscess - represents 75% of all pancreatic cysts – usually occur after a bout of acute pancreatitis - histology: there is smooth borders no lining of the epithelium – instead is lined by fibrin and granulation tissue
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serous cystadenoma
cyst mass w/out atypica- seen in elderly females, straw colored serous yellow fluid in it neg. mucin stain
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mucinous cystic neoplasms
slow growing, painless mass in adult females makes mucinous fluid see smooth borders w/ cysts lined by columnar mucinous epithleium
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Intraductal papillary mucinous neoplasms
• Typically arise in the main duct of the head of pancreas of males • May be benign, borderline or malignant • presents w/ obstruction, that is not a stone • histology: – see papillary neoplasm that distends the pancreatic duct – neoplasms behave like a stone and continue to grow and expand – must be removed in order to keep them from progressing to chronic pancreatitis – considered “intraductal neoplasm”
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pancreatic carcinoma
• 4th leading cause of Cancer Death in US – Median survival 9 months; 5% 5 year survival – only 20% completely resectable → s shelf: rectal pouch mass – metastasis • Diagnosis – Imaging: CT scan commonest, endoscopic US best (can do biopsy at the same time with US) – Tissue ddx: FNA cytology or needle core biopsy – Laboratory: CA 19-9 only for monitoring (classically elevated in pancreatic cancer – a marker to follow tx) • CANCER IS A TISSUE DIAGNOSIS • Pathology – Typically metastasize regional lymph nodesà then liverà then lungs – Direct local invasion (along nerves, duodenum, stomach, colon, vessels) – Peritoneal spread with ascites • Staging for possible surgery
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migratory thrombophelbtisi
pancreatic cancer
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palpable gallbladder
think pancreatic cancer
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STK11 mutation
peutz-jeghers syndrome = inherited risk of pancreatic carcinoma
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common somatic alterations in pancreatic ADCA?
- KRAS – growth factor signal transducer | - p16/CDKNA: (cell cycle regulator: tumor suppressor)
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Necrosis with portal bridging in liver
chronic hepatitis. Mild steatosis is seen in HCV infection. The incidence of chronic hepatitis is highest with HCV infection.
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AST | level that is higher than the ALT level
characteristic, however, of liver cell injury associated with chronic alcoholism
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Piecemeal hepatocellular necrosis
think HCV
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ceruloplasmin
Ceruloplasmin is an α2-globulin that carries copper in plasma. Because copper cannot be secreted into plasma, ceruloplasmin levels are low. in Wilson's disease
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K-RAS
K-RAS mutations are found in more than 90% of pancreatic adenocarcinomas