Gastroenterology Conditions A Flashcards
Crohn’s Disease - Description
granulomatous transmural inflammation of any part of the GI tract
Crohn’s Disease - Risk Factors (8)
1) chromosome 16 NOD2 mutation
2) white ancestry (esp. Ashkenazi Jews)
3) 15-40 years old
4) 60-80 years old
5) family history (20% 1st degree relative)
6) NSAIDs
7) smoking (3-4x)
8) stress
Crohn’s Disease - Pathophysiology (2)
1) inappropriate immune response to gut flora
2) granulomatous transmural inflammation of any part of the GI tract
Crohn’s Disease - Symptoms (8)
dependant on region affected 1) diarrhoea with urgency (5-6 times in 45 mins) (non-bloody) 2) steatorrhea 3) right abdominal pain (presents acutely with right iliac fossa pain, mimicking appendicitis) systemic symptoms in attacks 4) anorexia 5) weight loss 6) fever 7) fatigue 8) malaise
Crohn’s Disease - Signs (6)
1) aphthous oral ulcers (recurrent round mouth ulcers)
2) perianal lesions (skin tags, fistula, abscess, sinus)
3) abdominal tenderness
4) clubbing
5) erythema nodosum (tender, red cutaneous nodules due to adipocyte inflammation)
6) pyoderma gangrenosum (deep leg ulcers)
Crohn’s Disease - Complications (7)
1) malabsorption (inc. short bowel syndrome)
2) anaemia (iron, B9, B12, chronic disease)
3) bowel obstruction
4) bowel perforation
5) toxic megacolon
6) cholelithiasis
7) nephrolithiasis (oxalate)
Crohn’s Disease - Investigations (5/2)
initial
1) FBC (anaemia, leucocytosis, thrombocytosis)
2) high CRP + ESR
3) stool MS+C (exclude C. difficile, E. coli, Campylobacter)
4) faecal calprotectin (positive)
5) P-ANCA (positive, definite)
consider
1) colonoscopy* (spot lesions, transmural inflammation)
2) tissue biopsy (confirmation)
Crohn’s Disease - Management (3/5/1)
conservative 1) smoking cessation 2) elemental or polymeric diet 3) hospitalisation + monitor (severe) medical 1) corticosteroids (induce remission) 2) immunosuppressant (e.g. azarthioprine or methotrexate) (maintain remission) 3) TNF antibodies (infliximab) (refractory) 4) antimotility (e.g. loperamide) 5) antispasmodic surgery 1) enterectomy (80%, refractory, not a cure)
Ulcerative Colitis - Description
chronic mucosal inflammation of colon
Ulcerative Colitis - Types (3)
1) proctitis (50%)
2) distal colitis (30%)
3) extensive colitis (20%)
Ulcerative Colitis - Risk Factors (8)
1) HLA-B27
2) white ancestry (esp. Ashkenazi Jews)
3) family history (15% 1st degree relative)
4) 15–30 years old
5) NSAIDs
6) non-smoker/former-smoker
7) stress
8) infection
Ulcerative Colitis - Pathophysiology (2)
1) inappropriate immune response to gut flora
2) chronic mucosal inflammation of colon
Ulcerative Colitis - Symptoms (9)
1) diarrhoea (episodic —> chronic) (urgency - proctitis)
2) rectal bleeding (inc. bloody stool)
3) tenesmus (cramping rectal pain) (proctitis)
4) left abdominal pain (mild crampy —> severe)
systemic symptoms in attacks
5) anorexia
6) weight loss
7) fever
8) fatigue
9) malaise
Ulcerative Colitis - Signs (4)
1) abdominal tenderness
2) clubbing
3) erythematous nodosum (tender, red cutaneous nodules due to adipocyte inflammation)
4) pyoderma gangrenosum (deep leg ulcers)
Ulcerative Colitis - Comorbidities (8)
1) bowel obstruction
2) bowel perforation
3) toxic megacolon
4) inflammatory pseudopolyps
5) colorectal adenocarcinoma
6) primary sclerosing cholangitis
7) arthritis
8) spondylitis
Ulcerative Colitis - Investigations (5/2)
initial
1) FBC (anaemia, leucocytosis, thrombocytosis)
2) high CRP + ESR
3) stool MS+C (exclude C. difficile, E. coli, Campylobacter)
4) faecal calprotein (positive)
5) P-ANCA (positive, maybe)
consider
1) colonoscopy* (continuous uniform inflammation)
2) tissue biopsy (mucosal inflammation) (confirmation)
Ulcerative Colitis - Management (1/5/2)
conservative
1) smoking (not advised)
medical
1) corticosteroids (induce remission)
2) 5-ASA aminosalicylates (e.g. sulfasalazine) (induce + maintain remission)
3) TNF antibodies (e.g. infliximab) (refractory)
4) antimotility (e.g. loperamide)
5) antispasmodic
surgical
1) colectomy + ileooanal anastomosis (refractory, cure)
2) proctocolectomy + ileostomy* (refractory, cure)
Irritable Bowel Syndrome - Description
chronic bowel dysfunction and abdominal pain with no organic cause
Irritable Bowel Syndrome - Risk Factors (7)
1) <50 years old
2) female
3) physical/sexual abuse
4) stress
5) anxiety
6) depression
7) enteric infection (30%)
Irritable Bowel Syndrome - Types (3)
1) IBS-C (constipation)
2) IBS-D (diarrhoea)
3) IBS-M (constipation + diarrhoea)
Irritable Bowel Syndrome - Symptoms (5)
1) cramping abdominal discomfort/pain
2) abdominal bloating/distension (relieved by flatulence/defecation)
3) constipation and/or diarrhoea
4) symptoms worsen under stress, menstruation, gastroenteritis
5) symptoms worsen after eating
Irritable Bowel Syndrome - Signs (1)
1) normal abdominal examination with general abdominal tenderness
Inflammatory Bowel Syndrome - Diagnosis (Rome III Criteria) (3)
abdominal discomfort/pain >3 days/month in 3 successive months with associated:
1) relieved by defecation
2) change in stool form
3) change in stool frequency
Irritable Bowel Syndrome - Investigations (6/0)
arguably a ‘diagnosis of exclusion’ initial 1) FBC (normal) 2) stool MS&C (negative) 3) tTG IgA (negative) 4) endomysial IgA (negative) 5) abdominal x-ray (normal) 6) colonoscopy (normal)
Irritable Bowel Syndrome - Management (6/5/0)
conservative
1) regular small meals
2) low FODMAP diet
3) eat soluble fibre (e.g. oats, beans) (IBS-C)
4) avoid insoluble fibre (e.g. cereals, breads) (IBS-D)
5) high fluid intake
6) avoid caffeinated, alcoholic, fizzy drinks
medical
1) laxative (e.g. senna) (IBS-C)
2) SSRI (IBS-C, IBS-M) (refractory)
3) antimotility (e.g. loperamide) (IBS-D)
4) TCA (IBS-D, IBS-M) (refractory)
5) antispasmodic
Coeliac Disease - Description
autoimmune inflammation of small bowel triggered by dietary gluten peptides
Coeliac Disease - Risk Factors (5)
1) family history (10% 1st degree relative, 30% sibling)
2) genetics (HLA-DQ2, HLA-DQ8)
3) IgA deficiency
4) type 1 diabetes mellitus
5) autoimmune thyroid conditions (e.g. Graves’, Hashimoto’s)
Coeliac Disease - Pathophysiology (8)
1) dietary intake of barely, rye or wheat
2) poor digestion of gluten prolamin proteins
3) prolamin proteins pass through intestinal lumen
4) prolamin proteins are delaminates by tissue transglutaminase (tTG)
5) prolamin proteins activate gluten sensitive T cells (via HLA-DQ2 or HLA-DQ8)
6) T cell mediated inflammatory intestinal mucosal damage
7) intestinal villi atrophy, crypt hyperplasia, intraepithelial lymphocytes
8) malabsorption (e.g. B9, B12, iron —> anaemia)
Coeliac Disease - Symptoms (8)
1) asymptomatic (1/3)
2) diarrhoea
3) steatorrhea (fatty stinking stools)
4) abdominal discomfort/pain
5) bloating
6) nausea
7) vomiting
8) fatigue
Coeliac Disease - Signs (3)
1) failure to thrive
2) aphthous mouth ulcers (recurrent round mouth ulcers)
3) angular cheilitis (mouth corner ulcers)
Coeliac Disease - Complications (6)
1) anaemia
2) osteopenia —> oestoporosis
3) dermatitis herpetiformis
4) hyposplenism —> infection
5) malignancy (e.g. lymphoma)
6) pancreatitis (recurrent acute or chronic)
Coeliac Disease - Investigations (5/2)
initial
1) FBC (anaemia, esp. low iron or B12)
2) tTG IgA (positive)
3) endomysial IgA (positive)
4) enteroscopy
5) tissue biopsy* (villous atrophy, crypt hyperplasia, intraepithelial lymphocytes)
Coeliac Disease - Management (1/6/0)
conservative 1) avoid gluten medical 1) vitamin B9 supplement 2) vitamin B12 supplement 3) vitamin D supplement 4) calcium supplement 5) iron supplement 6) corticosteroids + rehydration (coeliac crisis)
Gastro-Oesophageal Reflux Disease - Description
gastric acid reflux into oesophagus
Gastro-Oesophageal Reflux Disease - Causes (3)
1) oesophagitis
2) sliding hiatus hernia (stomach cardia extends through diaphragm oesophageal hiatus) (80%)
3) rolling hiatus hernia (stomach fundus protrudes through diaphragm oesophageal hiatus) (20%)
Gastro-Oesophageal Reflux Disease - Risk Factors (8)
1) family history (3x)
2) old age
3) obesity
4) smoking
5) alcohol
6) caffeine
7) pregnancy
8) drugs (CCB, TCA)
Gastro-Oesophageal Reflux Disease - Symptoms (4)
1) heartburn (burning retrosternal discomfort after eating) (worse on lying, stooping, straining)
2) belching
3) acid brash (regurgitation)
4) water brash (salivation)
Gastro-Oesophageal Reflux Disease - Alarm Symptoms (3)
1) dysphagia —> odynophagia
2) haematemesis
3) weight loss
Gastro-Oesophageal Reflux Disease - Complications (4)
1) oesophageal stricture
2) oesophagitis
3) Barrett’s oesophagus (metaplasia of lower third of oesophagus squamous epithelium to columnar epithelium)
4) oesophageal adenocarcinoma
Gastro-Oesophageal Reflux Disease - Investigations (1/1)
initial
1) PPI trial
consider
2) oesophagoscopy* (if: alarm symptoms, 4 weeks of symptoms, failed PPI trial, over 55 years old)
Gastro-Oesophageal Reflux Disease - Management (3/4/1)
conservative
1) weight loss
2) smoking cessation
3) regular small meals
medical
1) antacids (e.g. calcium carbonate) (symptomatic)
2) alginates (e.g. gaviscon) (symptomatic)
3) PPI (e.g. omeprazole) (reduces gastric acid production)
4) H2a (e.g. cimetidine) (reduces gastric acid release)
surgery
1) Nissen’s fundoplication (refractory)
Oesophageal Squamous Cell Carcinoma - Description
malignant proliferation of upper 2/3 oesophageal epithelium (55% of oesophageal cancers)
Oesophageal Squamous Cell Carcinoma - Risk Factors (6)
1) male
2) 60-70 years old
3) achalasia
4) low dietary fruit/veg
5) smoking
6) alcohol
Oesophageal Squamous Cell Carcinoma - Symptoms (6)
advanced at presentation
1) dysphagia (progressive, solids—>liquids)
2) odynophagia
3) pain (food impaction or tumour infiltration)
4) weight loss (prognostic - ability to tolerate therapy)
upper 1/3 symptoms
5) hoarse voice
6) cough