Gastro Flashcards

(57 cards)

1
Q

DDx for anorectal pain alone?

A

Anal fissure

Ulcerative proctitis

Anal herpes

Proctalgia fugax

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2
Q

DDx for anal lump without pain

A

skin tags

anal warts

anal carcinoma

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3
Q

DDx for anal pain and lump

A

Perianal haematoma

strangulated internal haemorrhoid

Abscess (ischiorectal or perianal)

Pilonidal sinus

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4
Q

Anal pain and bleeding

A

Proctitis

Anal fissure

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5
Q

Lump and bleeding vs Pain, Lump and Bleeding Ddx?

A

Anal carcinoma (blood in underwear or toilet paper) - usually painless

Second degree haemorrhoid (spontaneously reducing lump on straining) (lump, bleeding +/- PAIN)

Third degree haemorrohoid (lump prolapsing but reducible)

Fourth degree haemorrhoid

Ulcerated perianal haematoma (blood in underwear)

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6
Q

Anal bleeding (Without lump or pain) DDx

A

Internal haemorrhoids (bright red bleeding/separate from feces in toilet)

Colorectal carcinoma (blood mixed)

colorectal polyps (blood mixed)

Anal carcinoma

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7
Q

How are external and internal haemorrhoids differentiated?

A

External occur below the DENTATE line

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8
Q

Symptoms of haemorrhoids?

A

haematochezia (Bleeding) - Usually PAINLESS

Pain (associated with a thrombosed haemorrhoid)

Perianal pruritis

Faecal soilage

SUSPECT Dx - perianal pruritis, bright rectal bleeding, and/or perianal pain

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9
Q

Examination findings to be sough in a patient with haemorrhoids/suspected haemorrhoids?

A

Inspection - for fissure (Scarring can suggest partial healing), perianal excoriation, haematoma, prolapsing haemorrhoid, warts, skin tags (hypertrophic in chrons)

Digital rectal examination - palpate for masses, fluctuance, tenderness and characterisation of anal tone

Patients who have suspicion of internal haemorrhoids not detected on DRE require anoscopy/proctoscopy

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10
Q

When do haemorrhoids require endoscopic evaluation?

A

UNDER 40 - with minimal bleeding and no red flags - no endoscopy

OVER 40 - flexible sigmoidoscopy or colonscopy is performed based up on risk factors for colonic carcinoma

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11
Q

What are the grades of haemorrhoids?

A

1 - no prolapse, just prominent vessels, only bleeds

  1. prolapse on bearing down, spontaneously reduces
  2. prolapses and requires manual reduction.
  3. Permanent prolapse - cannot be mechanically reduced.
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12
Q

Management of haemorrhoids?

A
  1. Supportive measures
    - avoid constipation by increasing fibre in diet and using stool softeners
    - avoid straining at stool.
    - Responding to urge to defecate but not initiating defecation without the urge
  2. Symptomatic management

a) irritation - warm sitz baths 2-3 times daily, topical analgesic creams, hydrocortisone ointment (no longer than one week)

b) bleeding haemorrhoids - dietary modification, topical creams, if not improving options include rubber band ligation, and surgical management (for external)
c) Pain management (THROMBOSIS is associated with pain)
- conservative treatment is usually sufficient - resorption of clot occuring in several days usually. Where thrombosis is refractory or causing acute severe pain surgery may be indicated
d) Prolapsed internal haemorrhoids (graded 1-4) as grade increases more indication for consideration of definitive surgical management
3. Definitive treatment

Either - rubber band ligation, sclerotherapy, infrared coagulation of internal haemorrhoids

or Surgery

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13
Q

How does a perianal haematoma present?

A

PAINFUL Tense blue swelling at anal margin

  • thrombosed external haemorrhoid

Usually occurs acutely due to straining - heavy lifting, sneezing, coughing - appears as a PAINFUL LUMP

  • spontaneous rupture can occur relieving symptoms or resorption can occur in 1-2 weeks.
  • IF presents acutely - can be sent to ED to infiltrate local anaesthetic and incision
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14
Q

How does a perianal abcess present? What is the treatment?

A

obstructed anal crypt gland with pus collection in subcutaneous tissues

Red, tender, painful - can have fever and malaise

Management - Incise and Drain abcess

Oral Augmentin Duo Forte amoxicillin 875+ clavulanic acid 125 orally 12 hourly for five days

Review in 48 hours

if penicillin allergy

Bactrim 160+800 bd for five days and metronidazole 400mg bd for five days

Immunocompromised patients and diabetics may require hospital admission for IV antibiotics

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15
Q

What are common risk factors for pilo nidal sinus disease?

A

Overweight/obesity

Local trauma or irritation

deep natal cleft

increased hair density in natal cleft

Sedentary/prolonged sitting

FHx

(Can present in patient with no risk factors)

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16
Q

How can pilonidal sinus disease present?

A
  1. asymptomatic pilonidal cavity
  2. sinus
  3. acute infection
  4. chronic inflammation and drainage with an open wound of varying size

Acute disease - pain, swelling, mucopurulent discharge, fever, malaise (acute abcess managed with prompt incision and drainage - antibiotics only if cellulitis or systemic symptoms)

Chronic - recurrent or persistent pain or drainage - in rare cases can lead to SCC - chronic disease may require surgical excision

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17
Q

How do anal fissures present?

A

Acute severe pain, can be present at rest but worse with defecation

most fissures are primary and caused by local trauma from constipation, diarrhoea, vaginal delivery, anal sex

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18
Q

Acute vs Chronic anal fissure?

A

Acute - less than 8 weeks

chronic - more than 8 weeks

Chronic fissure often accompanied by external skin tag

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19
Q

Management of anal fissure?

A
  1. Stool softener if constipated
  2. Warm sitz baths 2-3 times a day
  3. Topical Glyceryl trinitrate cream
  4. Topical analgesic cream
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20
Q
A
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21
Q

Pathophys of coeliac

A

HLA-DQ2 and/or DQ8 alleles (Predisposition) + gliadin component of gluten (trigger) = Coeliac disease (enteropathy)

Note - many ppl with the alleles dont get coeliac

ONSET - any age - peak is 30’s and 40’s

Typically a thin patient with minimal subcut fat

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22
Q

What are associations with coeliac disease?

A
  1. Other autoimmune diseases - Type 1 DM, thyroid, Pernicious anaemia, Sjogrens, Primary billiary cirrhosis
  2. Downs Syndrome
  3. Dermatitis Herpetiformis
  4. Sub fertility
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23
Q

Clinical manifestations of coeliac disease

24
Q

Investigations in coeliac disease?

A

Coeliac antibodies - Tissue Transglutaminase antibody (tTG), deamidated gliadin peptide (DGP)

Total IgA (becaue 2-5% have IgA deficiency which makes their antibody tests unreadable)

and small intestine mucosal biopsy (looking for villous atrophy)

Coeliac antibodies must be performed on at least 6 weeks of gluten containing diet (4 slices of bread/day).

If patient on a gluten free diet already and doesnt want to go off - then buccal smear for HLA DQ8 and DQ2 (or serology)

If positive –> small bowel biopsy

25
Management of Coeliac disease?
1. Investigate for micronutrient deficiencies - (Iron, B12, folate, calcium, magnesium, phosphate, zinc, vitamin D) and treat any that are found. 2. Gluten Free Diet - educate patient about the same, provide resources and refer to dietician for assistance with dietary choices. 3. Referral to Coeliac Society of Australia (needs GP letter) and Gastrointestinal society of Australia for focussed resources. 4. Dexa Scan - to screen for osteoporosis. 5. Calcium and Vitamin D supplementation 6. Pneumococcal vaccination (As splenic atrophy can occur) 7. Screen for other autoimmune diseases - Thyroid, Type 1 DM, B12 deficiency anaemia, 8. Monitor for complications including Psychological -eg depression, neuropathy 9. Screen all first degree relatives 10. Repeat coeliac serology and bloods in 6 months then 12 monthly follow up.
26
Profuse watery diarrheoea, distension, abdominal cramps within two weeks of taking oral antibiotics
Pseudomembranous colitis Check C. Diff toxin Metronidazole 400mg TDS for 10 days. 10mg/kg for child
27
Management of uncomplicated diverticulitis
1. Augmentin Duo Forte (Amoxycillin 875, clavulanate 125) BD for five days 2. Liquid diet for 7 to 10 days 3. Paracetamol 1g qid prn for pain 4. Review in 48 hours 5. Explain red flags and when to go to ED 6. Explain the diagnosis
28
Managment of complicated diverticulitis?
Diverticulitis WITH - positive blood culture perforation peritonitis sepsis bowel obstruction abcess larger than 5cm diameter - Require admission, IV Abx, IV fluids and bowel rest (surgery considered if perforation, obstruction, severe abcess)
29
Investigations in Diverticulitis?
Investigation of choice is abdominal CT scan with oral and IV contrast BLoods: FBE, UEC LFT Urine MCS Pregnancy test in females Stool studies only if dx is not clear
30
Patient post diverticular surgery presents with bubbles and particulate matter in urine
Colovesical fistula CT abdomen and pelvis Surgical management
31
Any dietary modifications in prevention of diverticulitis?
High Fibre diet
32
Which drugs can lead to heamatemesis
Antiplatelet - eg aspirin Anticoagulant - warfarin, noac NSAIDS SSRI can reduce platelet
33
Management of haematemesis
1. Secure airway, breathing, circulation. 2. Obtain IV access with a large guage cannula 3. Administer 20ml/kilo fluid bolus of Normal Saline 4. Arrange emergent transfer to hospital via ambulance for urgent endoscopic evaluation and definitive management.
34
What is the DDx for a right illiac fossa mass?
1. Bowel Ca 2. Appendicular Abcess 3. Chrons disease with Ileal disease 4. Ovarian Ca or benign cyst 5. PID
35
What are the colorectal screening guidelines?
36
Bowel Ca mortality?
In Australia, bowel cancer has the second highest mortality rate of all cancers. However, if detected early, 90% of cases can be successfully treated.
37
Which GI symptoms warrant immediate referral?
Unintentional weight loss (\>10% in three months) Rectal bleeding (in the absence of documented haemorrhoids or anal fissure); melena Symptom (eg altered bowel habit) onset after 50 years of age Severe or worsening gastrointestinal symptoms Family history of organic gastrointestinal disease Positive faecal occult blood test Palpable abdominal mass Iron deficiency anaemia (unexplained) Nocturnal diarrhoea
38
Family history screening questionairre from redbook?
Have any of your close relatives had heart disease before 60 years of age? ‘Heart disease’ includes cardiovascular disease, heart attack, angina and bypass surgery . Have any of your close relatives had diabetes? ‘Diabetes’ is also known as type 2 diabetes or non-insulin dependent diabetes. Do you have any close relatives who had melanoma? Have any of your close relatives had bowel cancer before 55 years of age? Do you have more than one relative on the same side of the family who had bowel cancer at any age? Please think about your parents, children, brothers, sisters, grandparents, aunts, uncles, nieces, nephews and grandchildren.\* Have any of your close male relatives had prostate cancer before 60 years of age? Have any of your close female relatives had ovarian cancer? Have any of your close relatives had breast cancer before 50 years of age? Do you have more than one relative on the same side of your family who has had breast cancer at any age? Please think about your parents, children, brothers, sisters, grandparents, aunts, uncles, nieces, nephews and grandchildren.\*
39
What if an asymptomatic inidvidual has a relative with multiple CRCs or adenomatous polyposis, or at least three first- or second-degree relatives with a Lynch syndrome–related cancer?
Such individuals require a referral to a familial cancer clinic for more intensive screening
40
How do you collect a FOB Sample?
The iFOBT test kits include **two collection tubes, a ziplock bag, two toilet liners, an instruction sheet, a personal information form and a pre-paid envelope.** The test involves very simple steps that can be done conveniently and privately at home. **Two samples are required from two separate bowel movements,** which ideally are collected as close together as possible (on the same day or the following day).15 The **patient writes their name, date of birth and the date of the sample on the label of the collection tube.** After urinating and flushing the toilet, they should **place one of the toilet liners on the water in the toilet bowl; this will catch the faeces.** Once the patient completes their bowel movement, _they open the collection tube and scratch the tip of the cap over different areas of the faeces on the toilet liner. Only a tiny amount is needed (smaller than a grain of rice). The patient places the cap on top of the collection tube and presses until they hear a click. The collection tube should be shaken several times before being placed into the ziplock back_. Samples are ***returned for testing in the reply-paid envelope with a completed patient information form. Results are typically received in two weeks.*** Further information regarding the test can be obtained by calling 1800 930 998 or visiting Cancer Institute NSW’s **‘Do the test’ website.**
41
What are the risks of colonoscopy?
bleeding requiring intervention (1.4:1000) colon perforation (0.68:1000) reactions to anaesthetic agents including breathing and cardiac complications severe abdominal pain poor reaction to bowel preparation death (0.08:1000).
42
Aside from screening what preventative activities are recommended for colorectal cancer?
abstaining from **smoking** limiting **alcohol consumption** maintaining a **healthy BMI** eating a healthy diet – evidence suggests diets **low in animal fats and high in fibre such as fruits, vegetables and whole grains** may reduce the risk of CRC20 consider taking a **low-dose aspirin (100 mg daily)** – currently, level I evidence suggests that regular consumption of aspirin can reduce the incidence of and mortality from CRC. Evidence also supports the use of low-dose aspirin as chemoprophylaxis. It is recommended that GPs discuss commencing low-dose aspirin (100–300 mg) as a form of chemoprophylaxis with all people aged 50–74 years regardless of their risk level, unless there are any contraindications.20–22 Some higher-risk groups have different recommendations; for example, L**ynch syndrome carriers are recommended to start aspirin from approximately 25 years of age.**22
43
ADR of asprin
Studies have shown that gastrointestinal bleeding, dyspepsia, peptic ulcers and haemorrhagic stroke are associated with long-term use of aspirin, and aspirin should be avoided when the patient has documented allergic reactions to aspirin or renal impairment.
44
How is severity of colitis established?
Diarrhoeal frequency Less than 4/day mild 4-6 mod Over 6 severe Systemic symptoms - Tachycardia/Hypotension/Fever is an indicator of severity
45
Chron's clinical features
**Fatigue** **Abdo pain** **Weight loss** **Fevers** **Diarrhoea** - fluctuating - Inflammation of terminal ileum (bile reabsorption affected) - bile salt diarhhoea - Bacterial overgrowth (due to dysregulated gut microbiome) - Excessive fluid secretion (secretory diarrhoea) **Cx** - bowel obstruction fistulae perianal disease - skin tags/fissures toxic megacolon - colon \> 6cm due to fulminant colitis peritonitis (UC symptoms - bleeding/perforation can also occur in Chrons)
46
What are extra-intestinal manifestions of IBD
1. Oral ulcers 2. Erythema nodosum 3. Large joint arthritis 4. Eye disease - episcleritis/uveitis 5. Primary sclerosing cholangitis (UC) 6. Ankylosing spondylitis 7. Pyoderma Gangrenosum 8. Kidney stones 9. Gallstones
47
Distinguishing Chrons from UC
1. Usually Spares rectum 2. causes fistulae 3. skip lesions 4. Can cause strictures and bowel obstruction
48
Tests to be ordered in IBD?
Stool: MCS/ fecal multiplex PCR Calprotectin - VERY SENSITIVE (not specific) so if its positive needs to have a colonoscopy Inflammatory markers: WCC/Platelets ESR and CRP Micronutrients: Iron, Vitamin D and B12, CMP, Albumin Metabolic: TSH, LFT, UEC Gen: HLAB27 IMAGING Barium enema or CT Abdomen ENDOSCOPY - Colonoscopy
49
What part of gut does UC affect?
Continuous (Chrons is patchy with skip lesions) from rectum proximally - does not extend beyond ileocecal valve
50
Examination in IBD?
**General** Vitals: HR, BP, Temp WEIGHT, BMI, waist circumference Signs of anaemia and dehydration **ABDO** = palpable masses? Tenderness? Distension? Perianal region: Fissure, skin tags, abcess, fistulae DRE **Oral** inspection **Eyes, Joints, Skin** - for extraintestinal manifestations
51
How is the diagnosis of UC made?
1. Exclusion of infectious causes on stool testing. 2. Characteristic appearance on endoscope and histology GRANULAR RED PROCTITIS on colonoscopy/proctosigmoidoscopy +/- contact bleeding
52
What is acute severe UC
Acute severe UC is (Trulove/witts criteria) *_6 or more bloody stools per day_* **+** **one or more of the following:** Temp more than 37.8 degrees C HR over 90 bpm HB less than 105 ESR over 30 **So any UC patient with over 6 bloody stools with tachy cardia or Fever - send to ED For emergency admission** **IV steroids/Fluids** - +/- emergency surg salvage treatment or colectomy or DO NOT give antidiarrhoeals, opioids or anticholinergic drugs in severe as it can precipitate TOXIC mega colon
53
How is diagnosis of chrons made?
Fecal calprotectin - very sensitive characterisitc appearance on barium enema Colonocopy - cobble stone appearance Tends to be more focal and transmural than UC
54
If someone has an isolated billirubin rise what would you do?
1. Check Unconjugated - if greater than 70% then likely Gilberts If billi is rising - then check for haemolysis - LDH, retics, bloods film and haptoglobin
55
How long after an acute diverticulitis attack should you wait before colonscopy
So dont do it acutely - as risk of perforation with CO2 insufflation Wait six to 8 weeks after acute attack
56
When are Abx indicated for diverticulitis
Fever or elevated white cell count give Augmentin DF 875/125 bd for five days
57
How is a diverticular abcess treated
Hosptial admission IV antibiotics Bowel rest Surgical review May require CT guided percutaneous drainage or other surg proc