Gastrointestinal Flashcards
Epigastric pain that radiates to R shoulder is most suggestive of …
Cholelithiasis … (pancreatitis won’t radiate to shoulder)
Typical duration of abdominal pain in setting of cholelithiasis?
< 6 hours
Best initial test for diagnosing cholelithiasis?
Abdominal US
Best treatment for patients with typical biliary colic symptoms and confirmed gallstones on US?
Pain management + Elective laparoscopic cholecystectomy
US finding that suggests pancreatitis due to gallstones?
Dilation of CBD
Patient presents with abdominal pain, jaundice, LFT abnormalities; CBD appears dilated on US – diagnosis?
Choledocholithiasis
Best treatment for Choledocholithiasis?
ERCP
Best treatment for Cholangitis?
ERCP
2 most common sites of metastasis for choriocarcinoma?
Lungs, Vagina
41 yo female presents 4 months post-partum with abnormal vaginal bleeding; Exam shows enlarged uterus, vascular vaginal lesion; Labs show (+) pregnancy test – diagnosis?
Choriocarcinoma
Post-cholecystectomy diarrhea is a type of ___ diarrhea
Bile-salt induced
What accounts for colonic stimulation in the setting of post-cholecystectomy diarrhea?
Bile acids are secreted from the liver directly into the intestinal lumen
In which 2 settings is bile-salt induced diarrhea present?
Ileal resection, Short bowel syndrome
Best treatment for bile-salt induced post-cholecystectomy diarrhea?
Cholestyramine
MOA of cholestyramine in treatment of bile-salt induced post-cholecystectomy diarrhea?
Resin that binds and sequesters bile-salts
Epidemiology of hepatic adenoma?
Young women on OCPs
Appearance of hepatic adenoma on CT?
Well-demarcated lesion, Shows peripheral enhancement with IV contrast
Best treatment for hepatic adenomas <5 cm in size?
Discontinuation of OCPs … (usually results in tumor regression)
Best treatment for hepatic adenomas that are symptomatic, or >5 cm in size?
Surgical resection
4 protect factors against colon CA?
High-fiber diet, NSAID use, Hormone replacement therapy, Regular exercise
3 most common symptoms associated with Primary Biliary Cholangitis (PBC)?
Fatigue, Pruritis, Xanthelasma
Lab value associated with PBC?
Elevated alkaline phosphatase
Highly-specific antibody associated with PBC?
Anti-mitochondrial antibody
Diagnostic test for PBC?
Liver biopsy
Appearance of liver biopsy in setting of PBC?
Fibrosis + obliteration of intrahepatic bile ducts
Which treatment may slow the progression of PBC?
Ursodeoxycholic acid
Only curative treatment for PBC?
Liver transplant
Common complication of PBC?
Osteopenia/Osteoporosis … from Vitamin D deficiency
Best treatment for prevention of Osteopenia/Osteoporosis in setting of PBC?
Ca2+, Vitamin D, Bisphosphonates
Alternate name for Vitamin B2?
Riboflavin
Clinical presentation of Riboflavin deficiency?
Angular cheilosis, stomatitis
Alternate name for Vitamin B1?
Thiamine
Clinical presentation of Thiamine deficiency?
Wet Beriberi, Wernicke-Korsakoff Syndrome
Alternate name for Vitamin B3?
Niacin
Clinical presentation of Niacin deficiency (aka Pellagra)?
3 D’s … Diarrhea, Dermatitis, Dementia
Metabolic + electrolyte disturbance associated with pyloric stenosis?
Hypokalemic, hypochloremic metabolic alkalosis
Renal lab results associated with pyloric stenosis?
Elevated creatinine + BUN
Why might BUN and creatinine be elevated in setting of pyloric stenosis?
Pre-Renal AKI
Diagnostic test for pyloric stenosis?
Abdominal US
Initial step of treatment for pyloric stenosis?
Rehydration + correction of electrolyte abnormalities … Before surgery
Which 2 ABX are associated with increased risk of pyloric stenosis?
Azithromycin + Erythromycin
Azithromycin + Erythromycin belong to class of …
Macrolides
Why might Azithromycin + Erythromycin be prescribed to an infant?
Post-exposure prophylaxis against pertussis
Feeding behavior that might increase an infant’s risk for pyloric stenosis?
Bottle-feeding, rather than breast-feeding
Clinical presentation of anal abscess?
Severe, constant pain accompanied by fever; Erythematous, indurated mass with fluctuance
Typical location of anal abscesses?
Midway between anus + ischial tuberosity
Best management of anal abscesses?
Prompt I&D
Which patients with anal abscesses should also be treated with ABX?
DM, immunosuppression, cellulitis, valvular heart disease
Most common complication of anal abscesses?
Fistula formation
Clinical presentation of anal abscess, complicated by fistula formation?
Abscess that undergoes I&D, but continues to drain
Most common location of abdominal pain in setting of lactose intolerance?
Periumbilical
2 foods that contain high lactose content?
Milk, ice cream
2 foods that contain low lactose content?
Cheese, yogurt
How can you distinguish lactose intolerance from gluten intolerance?
Gluten intolerance = patients undergo weight loss + growth failure
Chronic watery diarrhea, bloating, flatulence in adults is suspicious for …
Lactose intolerance
Cause of Lactose intolerance?
Reduced activity of lactase enzyme
Additional evaluation + management for patients with new-onset Lactose intolerance?
Ca2+ and Vitamin D
Classic triad of clinical presentation for intussusception?
Episodic abdominal pain, Red currant jelly stool, Sausage-shaped mass
Imaging study of choice for intussusception?
US
Classic US finding seen in cases of intussusception?
Target sign
Best initial management for intussusception?
Air enema, Water-soluble enema
What accounts for telescoping of bowel in setting of intussusception?
Lymphoid hyperplasia (Peyer’s patches), Pathologic lead point (Meckel diverticulum)
Most common age of presentation for intussusception?
6 months – 3 years
Complication of intussusception?
Intestinal perforation
Clinical presentation of Intestinal perforation in cases of intussusception?
Severe abdominal pain, rebound, guarding
Best initial management of suspected Intestinal perforation in intussusception?
Abdominal XR … looking for free air
If free air is noted on abdominal XR, what is next step of management for suspected Intestinal perforation in intussusception?
Surgical repair (immediate)
Best test to evaluate pancreatic cysts for malignancy?
Endoscopic US with aspiration
Triad of symptoms seen in acute appendicitis?
Fever, R-sided abdominal pain, Leukocytosis
What accounts for lack of peritoneal signs (+ McBurney’s TTP) in setting o appendicitis during pregnancy?
Upward displacement of appendix … decreased contact with peritoneum
Best initial evaluation of suspected appendicitis during pregnancy?
Compression US
Complication of untreated appendicitis?
Pylephlebitis
Pylephlebitis refers to …
Infective portal vein thrombosis
Clinical presentation of Pylephlebitis?
Fever, RUQ pain, jaundice, hepatomegaly
Pylephlebitis commonly results from …
Untreated appendicitis or diverticulitis
Why does Pylephlebitis result from infection of abdominal cavity?
Portal vein drains that majority of the GI tract
Best treatment of Pylephlebitis?
Prolonged ABX therapy
Definition of acute diarrhea?
Lasting <14 days
Definition of dysentery?
Acute diarrhea with visible blood + mucus
4 most common pathogens responsible for dysentery?
Salmonella, Shigella, EHEC, Campylobacter
Non-infectious causes of dysentery?
Inflammatory bowel disease, Ischemic colitis
3 aspects of initial evaluation of dysentery?
Stool culture, immunoassay for Shiga toxin, Fecal leukocyte count
Low fecal leukocyte count in the setting of dysentery suggests …
Invasive amebiasis
G6PD deficiency results in ___ hyperbilirubinemia
Unconjugated (indirect)
Additional lab feature of G6PD deficiency?
Hemolytic anemia
Appearance of G6PD deficiency on blood smear?
Bite cells with Heinz bodies
Inheritance pattern of G6PD deficiency?
X-linked
Best treatment for cases of mild G6PD deficiency?
Supportive care (hydration)
Best treatment for cases of moderate/severe G6PD deficiency?
Phototherapy, exchange transfusion
Biliary atresia results in ___ hyperbilirubinemia
Conjugated (direct)
Etiology of biliary atresia?
Destruction of extrahepatic biliary tree
Breastmilk jaundice results in ___ hyperbilirubinemia
Unconjugated (indirect)
At what age does colon CA screening begin for general population?
50 yo
3 options for colon CA screening in general population?
Colonoscopy q10y, Flexible sigmoidoscopy q5y, High sensitivity fecal occult blood testing q1y
Recommended age of screening for patient with colon CA in 1st-degree relative?
40 yo … OR 10 years prior to age of diagnosis (whichever comes first)
3 features of adenomatous polyp associated with increased risk of colon CA?
Size > 1 cm, Villous morphology, High-grade dysplasia
Recommendation for patients with high-risk adenomatous polyp?
Repeat colonoscopy in 3 years
Patient with high-risk adenomatous polyp completes colonoscopy 3 years after initial discovery of high-risk adenomatous polyp; No new polyps are found - what is recommended follow-up?
Repeat colonoscopy in 5 years
1st step of workup for patient with suspected gastroparesis?
Upper GI endoscopy, Barium swallow
Value of upper GI endoscopy or barium swallow in the initial evaluation of suspected gastroparesis?
Rule out mechanical obstruction
Diagnostic test for suspected gastroparesis?
Nuclear gastric emptying study
Metabolic abnormality associated with gastroparesis?
Unstable diabetic control, frequent hypoglycemia
Clinical presentation of gastroparesis?
Delayed emptying, sweating, constipation
What accounts for sweating in the setting of gastroparesis?
Autonomic neuropathy
Best management of gastroparesis?
Dietary modification
2 medications that may be used in cases of gastroparesis, unresponsive to dietary changes?
Erythromycin, Metoclopramide
Clinical presentation for oropharyngeal dysphagia?
Difficulty initiating swallow
Clinical presentation for esophageal dysphagia?
Delayed sensation of food sticking in chest
Typical etiology of dysphagia that involves both solids and liquids?
Neuromuscular disorder
Typical etiology of dysphagia that involves solids?
Mechanical obstruction
2 best initial tests for patient with suspected Mechanical obstruction causing dysphagia?
Nasopharyngeal laryngoscopy, Barium swallow
Typical location of esophageal adenocarcinoma?
Mid-distal esophagus
Typical location of esophageal squamous cell carcinoma?
Upper esophagus
Strongest risk factor for development of esophageal adenocarcinoma?
GERD
Strongest risk factor for development of esophageal squamous cell carcinoma?
Smoking, ETOH
Pathology of Barrett’s esophagus?
Metaplastic columnar epithelium replacing normal stratified squamous epithelium
Risk of Barrett’s esophagus?
Development into esophageal adenocarcinoma
Gross appearance of Barrett’s esophagus?
Columnar epithelium that appears as red velvet
EGD shows intestinal metaplasia (Barrett’s) without dysplasia – best management?
Repeat EGD in 3-5 years
EGD shows intestinal metaplasia (Barrett’s) with low-grade dysplasia – best management?
Repeat EGD in 0.5-1 year
EGD shows intestinal metaplasia (Barrett’s) with high-grade dysplasia – best management?
Endoscopic eradication therapy
Patient with HX of ulcerative colitis presents with diarrhea, abdominal pain; Vitals show fever, tachycardia, abdominal tympany to percussion – diagnosis?
Toxic megacolon
DOC for management for toxic megacolon?
Glucocorticoids
MOA of Glucocorticoids in management for toxic megacolon?
Decrease severity of underlying inflammatory bowel disease (IBD)
Which patients with toxic megacolon should NOT receive Glucocorticoids?
Patients with toxic megacolon secondary to C. diff infection
Which medications should be held in the setting of toxic megacolon?
Meds that decrease peristalsis … opioids, anticholinergics
Non-pharmacologic management for toxic megacolon?
NG tube placement
22 yo male presents with R shoulder pain, dry cough; Reports open laparotomy 2 weeks ago for appendectomy; Exam shows fever, abdominal TTP; Labs show leukocytosis - diagnosis?
Subphrenic abscess
2 hallmark aspects of clinical presentation for Subphrenic abscess?
Cough, R shoulder pain
Diagnostic test for Subphrenic abscess?
Abdominal US
65 yo male presents with severe upper abdominal pain; Reports HX of GERD; PE shows extreme TTP of abdomen, but exam is limited by patient discomfort – diagnosis?
Peritonitis … caused by ruptured peptic ulcer
Best management of ruptured peptic ulcer?
Emergency surgery
Additional treatments for ruptured peptic ulcer, before patient goes to OR?
IV fluids, IV ABX, IV PPI
IV ABX in setting of ruptured peptic ulcer should cover …
Gram (-) bacteria
Most common cause of small bowel obstruction in patients with HX of abdominal surgery?
Adhesions
65 yo female presents with epigastric pain, worse after eating, radiating to back; States that she has no desire to eat, lost 20 lbs; HX of T2DM, HTN, smoking, HLD, CABG; CT abdomen demonstrates diffuse aortic atherosclerosis – diagnosis?
Acute mesenteric ischemia
What accounts for severe abdominal pain after eating in setting of Acute mesenteric ischemia?
Increased O2 demand
3 diagnostic tests for Acute mesenteric ischemia?
CT angiogram, MR angiogram, US duplex
Gold-standard test for diagnosis of Acute mesenteric ischemia?
Angiogram
33 yo female presents with elevated alkaline phosphatase levels – which additional lab value suggests liver abnormality vs. bone abnormality?
Elevated g glutamyl transpeptidase (GGT = liver)
Initial management of symptomatic hepatic sarcoidosis?
Systemic glucocorticoids
CXR finding seen in sarcoidosis?
Bilateral hilar adenopathy
48 yo male presents with AMS; Reports HX of ETOH cirrhosis; PE shows asterixis; Labs show elevated ammonia – diagnosis?
Hepatic encephalopathy
Circumstance that may increase patient’s likelihood of developing hepatic encephalopathy?
Volume loss (hypovolemia) … due to use of furosemide for treatment of volume overload
In addition to hypovolemia, what are 2 other changes that can precipitate hepatic encephalopathy in a cirrhotic patient?
Hypokalemia, Metabolic acidosis
1st step in treatment of hepatic encephalopathy that was likely precipitated by hypovolemia?
Electrolyte + fluid repletion
3 drugs in Analgesic class that may cause pancreatitis?
Acetaminophen, NSAIDs, Mesalamine, Sulfasalazine