MLA Gastroenterology Flashcards
Which cancer biomarker is associated with colorectal cancer?
Carcinoembryonic antigen
What type of resection is associated with the distal transverse, descending colon?
Left hemicolectomy
What type of resection is associated with cancer located in the caecum, ascending or proximal transverse colon?
Right hemicolectomy
What type of surgical resection is associated with the sigmoid colon, upper rectum, and lower rectum?
High anterior resection
What type of resection is associated with anal verge cancer?
Abdominoperineal excision of the rectum
Continuous superficial inflammation of the colonic mucosa from the rectum is diagnostic of what disease?
ulcerative colitis
Which IBD condition is associated with smoking as a protective factor?
Ulcerative colitis
Bloody diarrhoea is associated with which type of IBD?
Ulcerative colitis
What is the definition of mild ulcerative colitis?
4 or fewer stools/day - no signs of systemic toxicity
What is the definition criteria of moderate ulcerative colitis?
> 4 stools/day (frequent, bloody, loose) + mild anaemia.
What is the definition criteria of severe ulcerative colitis?
≥6 stools/day + severe cramps.
- Symptomatic presentation: Fever, tachycardia, anaemia, raised ESR + weight loss.
Which skin extraintestinal manifestation is associated with ulcerative colitis (related to disease activity)?
Erythema nodosum
Which extraintestinal ocular manifestation is associated with ulcerative colitis (related to disease activity)?
Episcleritis
Which dermatological condition characterised by deep violaceous ulcers is associated as an extraintestinal manifestation of ulcerative colitis?
Pyoderma gangrenosum
What investigation is indicated as an active inflammatory marker for IBD?
Faecal calprotectin
What is the definitive investigation to confirm ulcerative colitis?
Colonoscopy with biopsy
Crypt abscesses and goblet cell depletion is associated with which type of IBD?
Ulcerative colitis
Pseudopolyps are associated with which type of IBD?
Ulcerative colitis
Which investigation is indicated for suspected toxic megacolon in patients with ulcerative colitis?
Plain abdominal X-ray
Which severity scoring system is used for ulcerative colitis?
Truelove and Witts’ severity index
How many bowel movements per day is associated with severe ulcerative colitis?
6 or more
What is the first-line management for mild to moderate proctitis?
Rectal mesalazine
When should oral aminosalicylates be added once rectal mesalazine is trialled for mild ulcerative colitis?
Within 4 weeks if remission is not achieved
What is the second line management of mild ulcerative colitis if remission is not achieved within 4 weeks following rectal mesalazine?
add an oral aminosalicylates
what is the third line management of proctitis?
Oral corticosteroids
What is the maintenance therapy for proctitis?
Topical aminosalicylates
What is the first line management for extensive disease ulcerative colitis?
Topical aminosalicylates and high-dose oral aminosalicylates.
If remission is not achieved within 4 weeks of starting combination therapy for extensive ulcerative colitis, what is the second line of management?
Stop topical treatments and add an oral corticosteroid
What is the first line management of severe ulcerative colitis?
Intravenous hydrocortisone 100 mg
What is the alternative to hydrocortisone for the immediate management of severe ulcerative colitis?
IV ciclosporin
If there is no improvement following IV hydrocortisone after 72 hours for severe UC, what is the next line of management?
add IV ciclosporin to IV corticosteroids or consider surgery.
What is the maintenance management for severe ulcerative colitis?
Oral azathioprine or oral mercaptopurine
What are the indications of oral azathioprine or oral mercaptopurine?
After TWO or more inflammatory exacerbations in 12 months requiring treatment with systemic corticosteroids
What is the class drug of infliximab?
anti-TNF-alpha monoclonal antibody
Non-caseating transmural inflammation of the gastrointestinal tract is associated with what IBD diagnosis?
Crohn’s disease
Smoking has what effect on symptoms associated with Crohn’s disease?
Worsens symptoms
What is the characteristic appearance observed on colonoscopy in Crohn’s disease?
Skip lesions - cobblestone appearance
What is the first lesion observed in Crohn’s disease?
Aphthous ulcer
What is the complication associated with terminal ileal inflammation in Crohn’s disease?
- Bile salt malabsorption due to an inflamed terminal ileum
- Steatorrhoea related to bile salt loss
What ocular pathology is observed in Crohn’s disease?
Anterior uveitis
Which vitamin deficiency is associated with Crohn’s disease?
Vitamin B12 due to ileal diseae
What is the first-line induction management of Crohn’s disease?
Prednisolone
What is the second line management for Crohn’s disease if there are two or more inflammatory exacerbation in 12 months?
Thiopurines (azathioprine, mercaptopurine)
Which biologic therapies are available for the management of refractory disease and fistulating Crohn’s?
Anti-TNF alpha monoclonal antibodies e.g., infliximab and adalimumab
What enzyme should be measured first prior to starting Azathioprine or mercaptopurine ?
TPMPT activity
Low TPMPT activity results in what effect with concurrent thiopurine use?
increased risk of myelosuppression
What is the management of bile acid diarrhoea?
Cholestyramine
What is the management for fistulae and strictures associated with Crohn’s disease?
- Ileocecal resection for stricturing terminal ileal disease
What is the investigation of choice for perianal fistulae in Crohn’s disease?
- MRI
Which antibiotic is prescribed for perianal fistulae in Crohn’s disease?
Oral metronidazole
What are the adverse effects associated with azathioprine?
- Bone marrow suppression (FBC count)
- Nausea/vomiting
- Pancreatitis
- Increased risk of non-melanoma skin cancer
Azathioprine interacts with what drug?
Allopurinol
Which haplotype is associated with Coeliac disease?
DQ2, DQ8 HLA haplotypes
Which cutaneous manifestation is associated with Coeliac disease?
- Dermatitis herpetiformis
What is the first line of investigation for suspected Coealic disease?
Total IgA with serum IgA Tissue Transglutaminase antibodies
What is the confirmatory diagnostic investigation for Coeliac disease?
Duodenal biopsy
What histological findings are observed in Coeliac disease?
villous atrophy, crypt hyperplasia and increased intra-epithelial lymphocytes
Which type of cancer is associated with Coeliac disease?
enteropathy-associated T cell lymphoma (EATL)
Which immunisations should be offered for patients with Coeliac disease (with hyposplenism)?
influenza, meningococcal and pneumococcal (every 5 years) immunisations for people with Hyposplenism.
What investigation is indicated in patients with Coeliac disease to assess for the risk of osteoporosis?
DEXA scan
What is the life-long management of Coeliac disease?
Gluten-free diet
What is the most common cause of acute pancreatitis?
Gallstones
What is the second most common cause of acute pancreatitis?
Ethanol
Which drugs are associated with potentiating acute pancreatitis?
Thiazides, ACEi, statins, fenofibrate, azathioprine, tetracyclines, oestrogens, corticosteroids
What electrolyte derangement is associated with a poor prognosis of acute pancreatitis?
Hypocalcaemia
Which sign denotes peri-umbilical discolouration?
Cullen’s sign
Which sign denotes flank discolouration in acute pancreatitis?
Grey–Turner’s sign
What is the characteristic pain description associated with acute pancreatitis?
- Severe epigastric pain radiating to the back, relieved by sitting forward.
What serum investigation is raised in patients with acute pancreatitis?
Plasma amylase >3 upper limit
Which serum investigation is a more sensitive test for acute pancreatitis?
Serum lipase
What is the preferred radiological imaging of choice for acute pancreatitis?
CT scan
What is associated with a raised amylase?
Pancreatic pseudocyst, mesenteric infarct, perforated viscus, acute cholecystitis, and diabetic ketoacidosis.
Which scoring criteria is used to assess acute pancreatitis?
Modified Glasgow Criteria
What are the parameters of the Modified Glasgow Criteria ?
- Age >55 years
- White cell count - >15 x 109/L
- Blood glucose >10 mmol/L
- Serum lactate dehydrogenase >600 U/L
- Serum urea >16 mmol/L
- Serum-adjusted calcium <2.00 mmol/L
- Serum albumin <32 g/L
- Po2 > 7.9 kPa.
A score of x is associated with severe pancreatitis?
Score ≥3
What is the first line management of severe pancreatitis?
Intravenous fluids
IV antibiotics and analgesia
Consider enteral nutrition
What is the main pancreatic complication associated with acute pancreatitis?
Pancreatic pseudocyst formation
Which high hepatitis vaccine is mandated for travel to India?
Hepatitis A
Which vitamin deficiency is associated with dry skin, ocular dryness and night blindness?
Vitamin A
Which investigation is recommended for assessing peritoneal metastatic nodules in the gastric carcinoma before major abdominal surgery?
Diagnostic laparoscopy
What are NICE referral guidelines for an urgent 2-week wait pathway (for upper endoscopy)?
Age >55 years with weight loss and upper abdominal pain, reflux or dyspepsia
A negative nitroblue tetrazolium test is suggests which diagnosis?
Chronic granulomatous disease
What are the two most common presenting features of chronic mesenteric ischaemia?
Postprandial pain and weight loss with an otherwise unremarkable examination
What is the gold-standard diagnostic test for chronic mesenteric ischaemia?
Arteriography
Which characteristic feature is observed in the iris, in patients with Wilson’s disease?
Kayser–Fleischer rings
Intermittent dysphagia with a history of atopy is associated with which diagnosis?
Eosinophilic oesophagitis
Which chronic disease commonly leads to cirrhosis among IV drug abusers?
Hepatitis C
Which syndrome is associated with neutrophil dermatosis associated with systemic upset in a patient with a background of IBD?
Sweet syndrome
What two serum tests are raised and consistent with a diagnosis of primary biliary cholangitis?
Serum IgM
Anti-mitochondrial antibodies (M2)
What is the first line management for PBC?
Ursodeoxycholic acid
Which grade of haemorrhoids protrudes from the anal canal with defecation/straining and shrinks spontaneously?
Grade 2
Which antibiotic is recommended for patients with campylobacter associated bacterial gastroenteritis?
Macrolide e.g., oral clarithromycin
Pigment laden macrophages within the mucosa on periodic acid Schiff staining and incidental colonic polyps is consistent with which diangosis?
Melanosis coli secondary to laxative abuse
What is the most common cause of melanosis coli?
laxative abuse
What is the eponymous sign or law that states that in the presence of a palpable gallbladder, painless jaundice is unlikely to be caused by gallstones?
Courvoisier’s
Which anti-emetic is contraindicated in Parkinson’s disease?
Metoclopramide
How frequent should endoscopic surveillance be performed in patients with Barrett’s oesophagus?
Every 2-3 years
What is the most common cause of acute cholangitis?
Gallstones
Other causes:
* Infection post-ERCP
* Tumours (pancreatic cholangiocarcinoma)
* Bile duct strictures or stenosis
* Parasitic infection (ascariasis)
What surgical intervention predisposes patients to developing acute cholangitis?
ERCP
What is the most common enteric bacterial cause of acute cholangitis?
Escherichia coli
Which triad of symptoms is associated with acute cholangitis?
Charcot’s triad:
1. Right upper quadrant pain (with tenderness, may refer to shoulder)
2. Fever with rigors
3. Jaundice
What is Reynold’s Pentad?
- Right upper quadrant pain (with tenderness, may refer to shoulder)
- Fever with rigors
- Jaundice
Reynold’s Pentad:
* Mental confusion
* Septic shock – hypotension
What is the first line imaging investigation for suspected acute cholangitis?
Abdominal ultrasound – stones and dilatation of the common bile duct
What is the first line management for acute cholangitis?
Intravenous broad-spectrum antibiotics until blood and bile cultures are obtained.
o Cefuroxime + metronidazole (gram-negative and anaerobic cover).
o Rehydration using saline bolus fluid.
What is the definitive management for acute cholangitis?
Remove obstruction using ERCP–suction
Which sign is positive in a patient with acute cholecystitis?
Murphy’s sign
What is the gold standard investigation of choice for acute cholecystitis?
Abdominal ultrasound of the biliary tree
What is the first line management for acute cholecystitis?
Bed rest, IV fluids, and antibiotics + analgesia
What is the definitive management for acute cholecystitis?
Laparoscopic cholecystectomy and common bile duct stone removal with ERCP
When should a laparoscopic cholecystectomy be performed following a diagnosis of acute cholecystitis?
Within 1 week of diagnosis
What complication of acute cholecystitis is associated with gallbladder pus distension?
empyema
What is the management of a gallstone empyema?
Percutaneous drainage
What is the most common composition of gallstones?
cholesterol
What are the risk factors for gallstone development?
Female, fair, fat fertile, forty
What is the presentation of gallstones?
- Biliary colic: Steady non-paroxysmal biliary pain – epigastrium/RUQ >30 minutes <8 hours; associated with nausea and vomiting.
What is the first line investigation for gallstones?
Abdominal ultrasound
What is the gold standard investigation for acute cholangitis?
MRCP
What is the first line analgesic option for severe biliary colic pain?
Diclofenac 75 mg IM (second 75 mg dose after 30 minutes)
Which serum marker is raised in patients with an upper gastrointestinal bleed?
Raised urea
What risk assessment tool is used as first assessment for upper GI bleeding?
- Blatchford Score
What risk assessment tool is used post endoscopy for upper GI bleeding?
- Rockall score
What is the first line management for stable patients presenting with an upper GI bleeding?
Endoscopic treatment (clips, thermal coagulation, fibrin)
What is the first line medical management for variceal bleeding?
Terlipressin and prophylactic antibiotics
What is the definitive management for varcieal bleeding?
Band ligation
What is the main risk factor for an anal fissure?
Constipation
What is the characteristic clinical presentation of an anal fissure?
- Anal pain (on defecation)
- Sharp and severe, followed by a deep burning pain that persists for several hours.
- Bleeding (bright red blood on the stool or toilet paper)
- Tearing sensation on passing stool
Most anal fissures are found where?
In the posterior midline
What is the first line management for patients with anal fissures?
Increase fibre and fluid intake
Stool softening laxatives
What is the first line analgesia for anal fissures?
Simple analgesia e.g., paracetamol/ibuprofen
What is the preferred management step for patients with persistent anal fissure symptoms >1 week?
Rectan GTN 0.4% for 6-8 weeks
What is the most common cause of small bowel obstruction?
Adhesions