Gastroenterology Flashcards
Intermittent dysphagia to solids and liquids
Chest pain
Diffuse esophageal spasm
Barium swallow will show corkscrew esophagus
Management for lower esophageal (Schatzki’s) ring
Pneumatic dilatation
Management for achalasia
Surgical myotomy
Intervention to R/o psuedoachalasia
EGD
Food impaction
Stacked concentric rings
Biopsy reveals +eosinophils
Eosinophilic esophagitis
HIV+ EGD with 1) large ulcer 2) multiple small ulcers 3) multiple white plaque like lesions
1) CMV
2) Herpes
3) candida
Diagnosing esophageal rupture
Gastrograffin swallow study
Hypochlorhydria
EGD with striking involvement of gastric folds or rugae
Menetrier disease
Treatment for H. Pylori
14 days of
PPI, Amoxicillin, Clarithomycin
OR
Metronidazole, Omeprazole, Clarithromycin
Recurrent h. Pylori despite triple therapy
Tetracycline
Metronidazole
Bismuth salicylate
PPI
Diagnosing Zollinger-Ellison syndrome
Elevated fasting gastric
If not diagnostic, then IV secretin
» increase gastric > 1000
Gastric varies alone
Gastric and esophageal varies
Splenic v thrombosis
Cirrhosis
Management for postprandial dumping 15 min after with palpitations, Sweating, low BP
High fiber, complex carbs, protein rich foods
Rapid emptying
Management for postprandial dumping/hypotension > 90 min later with palpitations, tachycardia, confusions
Frequent small meals, liquid and puréed diet
Complex sugars, low fiber, increased protein
(Hypoglycemia)
Post-gastrectomy with fat and B12 malabsorption
Blind loop syndrome with bacterial overgrowth
Deconjugation of bile salts»_space; steatorrhea
Next step in management after stabilizing patient with ascending cholangitis with Abx and IVF
ERCP
Management for cholodocolithiasis with dilated CBD
ERCP followed by cholecystectomy before discharge
Pancreas with Sausage shaped mass
Elevated IgG4
Management
Dx: Autoimmune pancreatitis
Tx: steroids
Recurrent pancreatitis
Ventral duct contents flowing normally to major papilla
Dorsal duct dilated and content flowing through minor papilla sluggishly
Pancreas divisum
Most important prognostic factor in acute pancreatitis
Increase BUN (>19 = poor prognosis)
Pancreatitis
Muscle spasms
Weakness
Hypocalcemia
Due to saponification
Complications of pancreatitis at 2 days < 2 weeks 1-4 weeks 4-6 weeks Anytime
2 days: fluid collections < 2 wks: pancreatic necrosis 1-4 wks: pseudocyst 4-6 wks: abscess Anytime: splenic vein thrombosis
Worrisome features on CT scan for pancreatic cyst
Solid
Size > 3 cm
Dilated duct > 10 cm
Thickening of cyst
Pancreatic cyst with 2 worrisome
Features on CT scan
EUS-FNA
Pancreatic cyst with EUS-FNA confirming 2 worrisome features, but FNA negative
Resect
Pancreatic cyst with EUS-FNA negative for worrisome feature
MRI in 1 year then q 2 years
2 cm pancreatic cyst lesion on CT
F/u MRI in 1 year shows size change
EUS-FNA
Pancreatic cyst with EUS-FMA showing inflammatory cells and RBCs
Resect
Pancreatic cyst resected for malignant lesions
Repeat MRI q 2 years
Large pancreatic cyst resected but no evidence of malignancy
No need for f/u after resection
Best screening tool for IBD
Fecal calprotectin
Extraintestinal manifestations that mirror IBD
Erythema nodosum
Peripheral arthritis
Pyoderma gangrenosum
Extraintestinal manifestations that DO NOT mirror IBD
Sacroiliitis
Primary sclerosing cholangitis
Best treatment for stricture in IBD
Surgery
Diarrhea
RLQ mass
Ulcer on tongue
Crohn’s disease
Bloody diarrhea
Colonoscopy with erythematous appearance with friable mucosa in distal colon
Ulcerative colitis
Diarrheal illnesses that wake patient up at night
IBD
Bacterial overgrowth syndrome
Dumping syndromes
Maintenance medication for IBD
5-ASA (mesalamine)
Management for immune checkpoint inhibitors induced side effects (I.e. abdominal pain, diarrhea, rash)
Hold ICI and start steroids
Ulcerative colitis
Jaundice, hepatomegaly
Beading and focal dilatation of biliary tree
Primary sclerosing cholangitis
Rectal bleed
Tenesmus
Anal fissure
Leg ulcer
Ulcerative colitis
Diarrhea of > 1L per day
Stool osmotic gap < 50
Secretory
Diarrhea is < 1L per day
Stool osmotic gap > 50
Osmotic
Prophylaxis for travelers diarrhea
Azithromycin
Diarrhea
Seafood
Gram negative, comma-shaped organisms
Vibrio parahrmolyticus
Diarrhea
T cell < 100
Cryptosporidium
Diarrhea
T cell < 50
CMV
MAC
N/V/D
Fish
Perioral parasthesias
Reversal of hot/cold sensation
Ciguatera toxin
Large reef fish
Fish
Flushing, urticaria, Paresthesias
Scombroid poisoning
Histamine build up
Fish
Paresthesias, weakness
Ascending paralysis, SOB
Tetrodotoxin
Puffer fish
Diarrhea
Acute dysentery
Flask-shaped ulcers
Amoebic colitis
Diarrhea
Turns red with NaOH
Laxative abuse
Malabsorption
Very high fecal fat
Pancreatitis
Malabsorption
High fecal fat
Low bile acid
Biliary disease
Malabsorption
High fecal fat
Low bile acid
Abnormal breath test
Bacterial overgrowth
Malabsorption
High fecal fat
Abnormal D-xylose
Mucosal
Lymphatic
Diarrhea
Itching
Anemia
Celiac sprue
Diagnosing celiac sprue
Transglutaminase IgG A Ab
If positive, small bowel biopsy
If negative, HLA DQ2 or 8»_space; gluten challenge 6-8 weeks»_space; repeat serology and biopsy
Management for dermatitis herpetiformis
Dapson
Diarrheal disease most associated with celiac sprue
Microscopic colitis
Steatorrhea
Macrocytic anemia
Abnormal d-xylose
Flattened villi with lymphocytic and plasma cell infiltrate in the lamina propria
Management
Dx: Tropical sprue
Caribbean»_space; B12 def
Asia»_space; folate def
Tx: tetracycline + folic acid
Arthritis
Dementia, visual disturbances
Foamy macrophages
PAS +
Management
Dx: Whipple’s disease
Tx: ceftriaxone + Bactrim or tetracycline
Management for bile acid malabsorption
Medium chain triglycerides
Management for bacterial overgrowth
Rifaximin
Postprandial abdominal pain
Fear of eating
Weight loss
Decreased blood flow and atherosclerosis
Chronic mesenteric ischemia
Sudden onset severe abdominal pain
N/V. Leukocytosis, lieus
Embolism in celiac or SMA
Acute mesenteric ischemia
Hematochezia Diarrhea Abdominal pain Low flow states Thumbprinting colon
Ischemic colitis
Post-radiation
Colonoscopy with Friability of mucosa
Radiation proctolitis
Best management for opioid induced constipation
Senna
Hepatitis DNA virus
Hepatitis B
HBsAg +
Anti-HBs -
IgM
Acute hepatitis B
HBsAg +
Anti-HBs -
IgG
Elevated ALT
Chronic Hepatitis B
HBsAg +
Anti-HBs -
IgG
Normal ALT
Carrier Hepatitis B
HBsAg -
Anti-HBs +
IgG
Past Hep B infection
HBsAg -
Anti-HBs +
No Anti-HBc
Post Hep B vaccination
HBsAg -
Anti-HBs -
IgG
Chronic Hep B
Past Hep B
False +
Management for Post Hep B exposure and anti-HBs > 10 U/L or < 10 U/L
> 10: reassurance
< 10: HBIG + booster Hep B vaccine
Indications for Hep B treatment
HBV DNA > 20,000 IU/mL + ALT >2x
HBV DNA > 10 IU/mL + cirrhosis
Any HBV DNA + immunosuppressed
If decompensated cirrhosis, transplant
If HBV DNA > 20,000 IU/mL + ALT 1-2x, biopsy
Treatment for HepB
Tenofovir or
Entecavir or
Alpha-interferon
Treatment for HepB + HIV
Tenofovir
Adverse effect of interferon
Thyroid disease
Prevention of neonatal Hep B in Hep B mother
Treat mother with Tenofovir and give newborn Hep B vaccine and HBIG
Hep C Ab +
HCV RNA -
IGRA +
No Hep C
HBc IgM + Hep D
Acute coinfection
Doesn’t make hepatitis worse
HBc IgG + Hep D
Acute superinfection
Can cause fulminant hepatitis
Elevated ALP
AMA +
Granulomas/Lymphocytic destruction of bile ducts
Primary Biliary cholangitis
Smooth muscle Ab +
Piecemeal necrosis characteristic on biopsy
Autoimmune hepatitis
Elevated ALP
Normal ALT
Inflammation with concentric fibrosis around bile ducts
Primary sclerosis cholangitis
Screen for HCC
Liver US
R/o HCC
Triple phase CT
Management for MELD < 14
MELD > 15
< 14: TIPS
> 15: Transplant
SAAG > 1.1
Total ascites protein > 2.5
< 2.5
Portal hypertension
> 2.5: RHF or Hep v thrombosis
< 2.5: Cirrhosis or portal v thrombosis
SAAG < 1.1
Total ascites protein > 2.5
< 2.5
> 2.5: Pancreatitis, TB, peritoneal carinomatosis
< 2.5: Nephrotic syndrome
Low serum ceruloplasmin
High urine copper level
Copper deposition in liver
Wilson disease
Pregnant
Elevated transaminases
Coagulopathy
Increased Dbili and Ammonia
Acute fatty liver of pregnancy