GI/Liver Flashcards
what is acute appendicitis?
an acute inflammation of the vermiform appendix
what age range is appendicitis most common in?
10-20 years
what are 3 risk factors for appendicitis?
low dietary fibre
improved personal hygiene
smoking
what is the pathophysiology of appendicitis?
Lumen of appendix is obstructed => fills with mucus => increased pressure => bacteria multiply (bacteriodes fragilis and E.coli) => distension of lumen => inflammation, oedema, ischaemia, necrosis, perforation => nausea, vomiting, pain, reflex anorexia
what are 6 manifestations of appendicitis?
acute abdomen pain localising to RLQ with guarding anorexia nausea + vomiting tense rigid abdomen low grade fever
what is the gold standard diagnosis for appendicitis?
CT abdomen
what are 3 investigations that can be done for appendicitis?
FBC - WBCs raised
CRP/ESR - raised
Urinalysis - pregnancy, renal colic excluded
what are 3 differentials for appendicitis?
ectopic pregnancy
UTI
Diverticulitis
what are 3 complications of appendicitis?
perforation
generalised peritonitis
appendicular mass
What is Barrett’s oesophagus?
a change (metaplasia) in the normal squamous epithelium of the oesophagus to specialised intestinal metaplasia (stratified squamous to simple columnar)
what are 4 causes for Barrett’s oesophagus?
GORD
Lower oesophageal sphincter hypotension
hiatus hernia
gastric acid hypersecretion
what are 3 risk factors for Barrett’s oesophagus?
smoking
obesity
male
what is the pathophysiology of Barrett’s oesophagus?
Reduced lower oesophageal sphincter mule tone => increased relaxation allowing reflux of gastric acid through the LOS => damage to squamous mucosa and eventual metaplasia to columnar cells
what are 4 clinical presentations of Barrett’s oesophagus?
heartburn
regurgitation
dysphasia
SOB/wheezing and belching
what is the investigation for Barrett’s oesophagus?
Upper Gi endoscopy + biopsy = gold
what are 3 differentials for Barrett’s oesophagus?
osephagitis
GORD
oesophageal carcinoma
what is the management of Barrett’s oesophagus?
1 - PPIs (omeprazole), lifestyle changes, radio frequency ablation
repeat endoscopic surveillance
what are 3 complications of Barrett’s oesophagus?
oesophageal adenocarcinoma
oesophageal strictures
quality of life deficit
what is coeliac disease?
systemic autoimmune inflammatory disease affecting the small intestine triggered by dietary gluten peptides found in wheat, rye, barley, and related grains.
what is the trigger in coeliac disease?
prolamins found in gluten
what are 3 risk factors for coeliac disease?
FHx IgA deficiency autoimmune disease (T1DM)
what immune cell is coeliac gluten intolerance mediated by?
T cell
what are 5 presentations of coeliac disease?
Diarrhoea or steatorrhoea abdominal bloating/discomfort anaemia indigestion dermatitis herpetiformis
what are 3 serological investigations for coeliac disease?
1 - Tissue transglutaminase antibodies and total IgA
2 - endomysial antibodies
anti-casein antibodies
what are 3 differentials for coeliac?
Crohn’s disease
peptic duodenitis
giardiasis
what are 3 complications of coeliac disease?
osteoporosis risk
increased risk of malignancy
Anaemia
what is Crohn’s disease?
a autoimmune inflammatory GI disorder characterised by transmural granulomatous inflammation of the GI tract from mouth to anus with skip lesions
are males of females more likely to be affected by Crohn’s and coeliac disease?
females
what are 3 risk factors for Crohn’s disease?
stress and depression
FHx
smoking
what is the pathophysiology of Crohn’s disease?
Transmural granulomatous inflammation of any part of GI tract => most common in terminal ileum and proximal colon.
skip lesions - cobblestone appearance
relapsing and remitting
what are 6 presentations of Crohn’s?
chronic diarrhoea weight loss Abdo pain (RLQ most common) blood in stool (less common than in UC) perianal lesions mouth ulcers
what are 3 blood tests for Crohn’s disease?
CRP + ESR - raised
FBC - anaemia (B12/iron/B9)
U+Es
what are 3 differentials for Crohn’s disease?
ulcerative colitis
infectious cause
coeliac disease
what is the management for Crohn’s disease flare ups?
1st - Glucocorticoids (budenoside, prednisolone or hydrocortisone depending on severity)
elemental diet
Immunosuppresion - azathioprine, mercaptopurine and methotrexate
Biologics - inflixibab
antibiotics for peri-anal disease
what are 3 complications of Crohn’s disease?
malignancy
fistulae
intestinal obstruction
what is diverticulitis?
inflammation of diverticula
diverticula = out pouching of the mucosa and submucosa through the muscular layer of the colonic wall
what is the main cause of diverticulitis?
low fibre diet
what are 3 risk factors for diverticulitis?
50+
low fibre diet
obesity
what part of the colon is diverticulitis most common in?
sigmoid colon
what is the pathophysiology of diverticulitis?
Low fibre => increased intestinal transit time and straining on loo => increased intraintestinal pressure => diverticula herniations => foecal matter gets stuck => infection => complications
what are 5 presentations of diverticulitis?
L lower quadrant pain/gaurding/tenderness blood on DRE fever diarrhoea/constipation palpable abdominal mass
what is the gold standard for diverticulitis?
Abdo CT with contrast
what are 3 blood tests for diverticulitis?
FBC - leukocytosis
U+E+C - creatinine elevated, uraemia
CRP - raised
what are 3 differentials for diverticulitis?
endometriosis
colorectal cancer
appendicitis
what is the management for diverticulitis?
dietary and lifestyle - fibre
analgesia
antibiotics - co-amoxiclav
surgical intervention
antispasmodics - dicycloverine
what are 3 complications of diverticulitis?
fistulae
abscesses
perforations
What is gastritis?
inflammation of the lining of the stomach associated with mucosal injury
what are 4 causes of gastritis?
NSAIDs
alcohol
H. Pylori infection
Autoimmune
what are 3 risk factors for gastritis?
H. Pylori infection
previous gastric surgery
autoimmune disease
what are 5 presentations of gastritis?
dyspepsia/epigastric discomfort fever severe emesis (vomiting) nausea haematemesis/malaena
what are 3 investigations for gastritis?
H. Pylori urea breath test/ faecal antigen test
endoscopy
anti-IF/parietal cell antibodies
what are 3 differentials for gastritis?
peptic ulcer disease
GORD
non-ulcer dyspepsia
what is the management for gastritis?
H. pylori eradication
PPIs
antacids
H2 antagonists
what are 3 complications of gastritis?
gastric carcinoma
gastric lymphoma
vitamin B12 deficiency
What is GORD?
the reflux of gastric contents into the oesophagus or beyond
what are 4 risk factors for GORD?
FHx
age
hiatus hernias
obesity
what are 5 presentations of GORD?
heart burn regurgitation chest pain/retrosternal pain coughing/belching Water brash
what are 3 investigations for GORD?
PPI trial
24 hour pH monitoring
endoscopy and biopsy
what are 3 differentials for GORD?
malignancy
stable angina
peptic ulcer disease
what are 4 managements of GORD?
PPIs - omeprazole
antacids
H2 receptor antagonist - ranitidine
life style changes
what are 3 complications of GORD?
Barrett’s oesophagus
strictures
oesophageal ulcer
what is IBS?
a chronic condition characterised by abdominal pain associated with bowel dysfunction where there is no structural abnormalities to explain the pain
what are 3 risk factors for IBS?
Female
stress
PTSD
what are the 3 different types of IBS?
IBS C - constipation
IBS D - Diarrhoea
IBS M - both
what are 5 presentations of IBS?
abdo discomfort / bloating
alteration of bowel habits
normal abdo exam
defecation urgency
what are 4 general bowel tests that can be run?
Faecal calprotectin
faecal occult blood tests
coeliac serology
foecal lactoferrin
what are 3 differentials for IBS?
crohn’s
coeliac
ulcerative colitis
what are the 2 main types of oesophageal cancer?
squamous cell carcinoma (smoking)
adenocarcinoma (GORD)
what are 4 risk factors for oesophageal cancer?
Barrett’s oesophagus
male
smoker
Achalasia
what are 6 presentations of oesophageal cancer?
dysphagia (solids then liquids) pain on swallowing weight loss hoarse voice/cough melana lymphadenopathy
what are 3 investigations for oesophageal cancer?
oesophogastroduodenoscopy with biopsy - gold
CT chest abdomen and pelvis
Barium swallow
what are 3 differentials for oesophageal cancer?
benign stricture
achalasia
Barrett’s oesophagus
what is the management of oesophageal cancer?
endoscopic resection
oesophgectomy
chemo - platinin based
radiotherapy
what are 3 complications of oesophageal cancer?
postoperative pneumonia
Prost-resection acid reflux
trachea-oesophageal fistula
what is a mallory Weiss tear?
mucosal tear at oesophageal gastric junction due to a sudden increase in iata-abdominal pressure => coughing/dry heaving
causes haematesis, postural hypertension and dizziness
what are oesophageal varices?
abnormal, dilated veins in the lower 1/3rd of the oesophagus that occur at the lower end of the oesophagus; they account for 10-20% of upper GI bleeds. A complication of portal hypertension
what percentage of patients with cirrhosis have oesophageal varices?
50% at diagnosis
what are 3 risk factors for oesophageal varices?
portal hypertension
cirrhosis
alcoholism
what are 6 presentations of oesophageal varices?
features of liver disease haematemesis melaena cirrhosis/liver disease abdo pain blood loss/shock symptoms
what are 3 investigations for oesophageal varices?
upper GI endoscopy - gold
FBC - anaemia
serum LFTs - deranged
U+Es - raised urea in upper GI bleed
what are 3 differentials for oesophageal varices?
hiatus hernia
gastric varices
mallory weiss tear
what is the management for non-bleeding oesophageal varices?
beta blockers
endoscopic ligation
what are 3 complications of oesophageal varices?
spontaneous bacterial peritonitis
encephalopathy
rebleed
what 2 veins form the portal. vein?
superior mesenteric and splenic veins
what is the normal pressure in the portal vein?
5-8 mmHg
what is a peptic ulcer?
A break in the mucosal lining of the stomach or duodenum more than 5 mm in diameter, with depth to the submucosa
what causes peptic ulcers?
Due to imbalance between factors promoting mucosal damage
gastric acid, pepsin, helicobactor pylori, NSAIDs – and those promoting gastroduodenal defence – prostaglandins, mucins, bicarbonate, mucosal blood flow
what are 4 risk factors for peptic ulcers?
H. Pylori
NSAIDs
smoking
FHx
why does H. Pylori infection increase peptic ulcer risk?
H.pylori => impaired somatostatin secretion => increased gastrin release => gastric acid hypersecretion
what are 5 presentations of peptic ulcer?
can be asymptomatic
abdo pain early satiety anorexia anaemia symptoms hypotension/shock - gastro bleeding
what are 3 investigations for peptic ulcers?
upper GI endoscopy and biopsy - gold
h. pylori breath/stool antigen
FBC + U+e + LFTs
what are 3 differentials for peptic ulcers?
oesophageal cancer
GORD
gastritis
what is the management of non H.Pylori peptic ulcers?
PPIs
H2 antagonist - nizatidine
what are 3 complications of peptic ulcers?
gastroduodenal bleeding
perforation
penetration
what is ulcerative colitis?
a type of relapsing remitting inflammatory bowel disease that characteristically involves the rectum and extends proximally to affect a variable length of the colon (colon mucosa)
is cronh’s or ulcerative colitis more common?
UC
what are 3 risk factors for ulcerative colitis?
FHx
HLA-B27 genes
NSAIDs - flare ups
what is the pathophysiology of ulcerative colitis?
Arises in rectum, affects only colon up to ileo-caecal valve, continuous (no skip lesions), mucosa reddened, inflamed and bleeds easily, ulcers and psueudopolyps in severe disease, non-transmural inflammation, depleted goblet cells, no granulomata, increased crypt abscesses
what are 5 presentations of ulcerative colitis?
blood and mucus in stools diarrhoea malnutrition and weight loss fever - during attack arthritis/spondyloarthritis/uveitis
what is the gold standard investigation for UC?
colonoscopy and biopsy
red raw mucosa with shallow ULCERS lamina propria inflammatory cell infiltrates (neutrophil) pseudopolysps crypt abscesses goblet cell depletion
what are 3 differentials for UC?
Crohn’s
indeterminate collitis
IBS
what are 3 complications of ulcerative colitis?
toxic megacolon (most common cause of death) colonic adenocarcinoma bowel obstruction
what is the treatment for mild ulcerative colitis?
1 - aminosalicylates - Sulfasalazine
2 - corticosteroids
where is B12 absorbed?
distal ilium
where is folate (B9) absorbed?
proximal jejunum/duodenum
where is iron absorbed?
duodenum
where is intrinsic factor secreted from?
stomach - parietal cells
needed for B12 absorptions
what is acute cholangitis?
an infection of the biliary tree, most commonly caused by obstruction.
what are 4 causes of acute cholangitis?
malignancies
strictures
cholethiasis (gallstones)
chronic pancreatitis
what are 3 risk factors for acute cholangitis?
50+
gall stones
post procedure injury
what is the pathophysiology of acute cholangitis?
Obstruction of bile duct results in bacteria in biliary tree, sludge forms providing a growth medium for bacteria, bile duct pressure increases => pressure gradient promotes extravasation of bacteria into blood stream => sepsis
what are 5 symptoms of acute cholangitis?
URQ pain/tenderness fever jaundice pruritis, dark urine, pale stools confusion
what are 3 investigations for acute cholangitis?
FBC - high WBCs
CRP - raised
ultrasound - 1st line
MRCP - gold
what are 3 differentials for acute cholangitis?
acute cholecystitis
peptic ulcer disease
acute
what is the management of acute cholangitis?
IV Antibiotics - cefotaxime and metronidazole IV fluids Analgesia biliary decompression - ERCP surgical drainage
what are 3 complications of acute cholangitis?
sepsis
hepatic abscess
acute pancreatitis
what type of bacteria is acute cholangitis usually caused by?
gram negative bacili
What s acute cholecystitis?
acute gallbladder inflammation, and one of the major complications of cholelithiasis or gallstones.
who are gallstones most common in?
women over 50
what are 3 risk factors for acute cholecystitis?
gallstones
physical inactivity
low fibre intake
where is obstructed in acute cholecystitis?
gallbladder neck or cystic duct
what are 5 presentations of acute cholecystitis?
RUQ pain and tenderness (possible R shoulder pain) - Murphy’s sign
palpable mass
fever, chills, tachycardia
nausea and vomiting
what is the gold standard test for acute cholecystitis?
abdo ultrasound - thickened gallbladder wall, distended gallbladder, presence of stone
what are 3 investigations for acute cholecystitis?
ESR/CRP - raised
FBC - WBCs raised
LFTs - may be raised
what are 3 differentials for acute cholecystitis?
acute cholangitis
pancreatitis
peptic ulcer disease
what is the management for acute cholecystitis?
antibiotics - cefuroxime and metronidazole
analgesia
cholecystectomy
what are 3 complications of acute cholecystitis?
obstructive jaundice
gallbladder empyema
galstone ileus
what is acute liver failure?
a rapid decline in hepatic function characterised by jaundice, coagulopathy (INR >1.5), and hepatic encephalopathy in patients with no evidence of prior liver disease
what are 3 causes of acute liver failure?
Drugs - Paracetamol overdose
viruses - Hep A/B/CMV
autoimmune hepititis
what are 4 risk factors for acute liver failure?
chronic alcohol abuse
poor nutritional status
female
pregnant
what are 5 presentations of liver failure?
jaundice signs of hepatic encephalopathy hepatomegaly bruising and GI bleeds (coagulopathy) RUQ pain nausea and vomiting
what are 3 blood tests for acute liver failure?
LFTs - deranged including prothrombin time and INR
U+E - low urea and high creatinine
blood glucose - low
what are 3 differentials for acute liver failure?
severe acute hepatitis
cholestasis
haemolysis
what is the treatment of acute liver failure?
treat underlying
good nutrition - thiamine and folate
what are 3 complications of acute liver failure?
Sepsis
AKI
haemorrhage
what are the 10 causes of acute pancreatitis? (mnemonic)
I GET SMASHED
idiopathic (or infections) Gallstones (50-60%) Ethanol (25-30%) Trauma Steroids Mumps autoimmune scorpion venom hyperlipidaemia ECRP Drugs
what are 3 risk factor for acute pancreatitis?
obesity
Diet
T2DM
what is the pathophysiology of acute pancreatitis?
The destructive effect of premature activation of pancreatic enzymes which cause self-perpetuating pancreatic inflammation by enzyme mediated autodigestion.
what are 6 presentations of acute pancreatitis?
severe epigastric pain radiating to back nausea and vomiting signs of hypovolaemia jaundice and steatorrhoea poor urinary output
what are 3 investigations for acute pancreatitis?
serum lipase/amylase - >3x normal - gold
FBC with differential - leukocytosis
haematocrit >44%
CRP - elevated
What are the 3 stages of alcoholic liver disease?
fatty liver (steatosis), alcoholic hepatitis (inflammation and necrosis), and alcoholic liver cirrhosis
what are 3 risk factors for alcoholic liver disease?
prolonged alcoholism
female
hepatitis C
how is alcohol metabolised?
in liver by alcohol dehydrogenase and cytochrome P-450 2E1 => chronic alcohol use causes cytochrome P-450 to produce more free radicals and alcohol dehydrogenase when converted to NADH inhibits gluconeogenesis and increases fatty acid oxidation
what are 7 signs of alcoholic liver disease?
caput medusa splenomegaly palmar erythema Dupuytren's contracture - thick palmar fascia - flexed fingers leuconychia - white lines on nails gynaecomastia spider naevi
what are 4 biochemical investigations for alcoholic liver disease?
LFTs - aminotransferase (AST) and alanine aminotransferase (ALT) elevated
FBCs - thrombocytopenia
serum bilirubin - elevated
serum albumin - low
what is the gold standard investigation for chronic liver disease (alcohol/nonA)?
liver biopsy - may show Mallory bodies, large mitochondria, neutrophil infiltrate, hepatocyte allowing, fibrosis and cholestasis
what are 3 differentials for alcoholic liver disease?
hepatitis A/B/C
cholecystitis
hepatic vein thrombosis
what is the management of alcoholic liver disease?
alcohol abstinence hydration nutrition steroids - predisolone - cirrhosis reduce salt avoid liver metabolised drugs liver transplant