GI and Hepatology Flashcards
Laxative abuse presentation
Very frequent, watery, nocturnal diarrhea. Melanosis coli.
Melanosis coli looks like
Dark brown colon with light patches which are the lymph follicles
Iron deficiency anemia DDx important
Always include colon cancer, colonoscopy is high on list of things to do
Most common cause of iron deficiency anemia in elderly
GI blood loss
Toxic megacolon most common cause
UC
Toxic megacolon tx
IV steroids, nasogastric decompression, and fluid management
BRBPR workup
In patients <50 with no risk factors for colon CA, do anoscopy/proctoscopy
Esophageal cancer vs. achalasia
CA can mimic achalasia very closely. Think of CA in old age, short history, rapid weight loss, and inability to pass endoscope through sphincter
Peptic strictures presentation
Pain with swallowing solids, but NO WEIGHT LOSS
What causes peptic strictures
GERD!!!, radiation, scleroderma, and caustic ingestions
Painless jaundice in old person is
Pancreatic head CA
How to treat ALL anal fissures
High fiber diet, large amount of fluids, stool softeners, local anesthetics
Multiple myeloma presentation
Back pain, anemia, renal dysfunction, elevated ESR, and hyperCa
Metastatic cancers to bone
Lung, breast, renal thyroid, prostate,
Constipation ddx
Always include hyperCa from myeloma or metastases to bone
Diagnosis of UC
Proctosigmoidoscopy with biopsy
Most commonly affected part of colon by ischemia
Splenic flexure
Most common abx cause of c.diff
Clindamycin
How to treat c.diff
Stop Abx and start flagyl
Scleroderma esophageal dismotility
Decreased LES tone
Any tests or signs of IBS
Nope, no lab tests or pathologic hallmark
Tx for asymptomatic diverticulosis
high fiber intake
H pylori diagnosis in patients <45
Noninvasive tests
Anti-endomysial antibodies
Celiac disease
Anti-scl 70 antibodies
Scleroderma
Anti-centromeric antibodies
CREST syndrome
Antimitochondrial antibodies
PBC
Gastrin in ZE syndrome for diagnosis
> 1000 pg/mL is diagnostic, if not this high, do secretin stimulation test
Causes of zinc deficiency
TPN or malnutrition.
Zinc def. signs
ALopecia, skin lesions, abnormal taste, and impaired wound healing
Endoscopy in achalasia?
Always, to rule out cancer
Most common complication of PUD
hemorrhage
Tx for ascites
- Sodium and water restriction 2. Spironolactone 3. Loop diuretic (not >1L/day) 4. Frequent abdominal paracentesis (2-4L/day, as long as renal function okay)
TPN RUQ complication
Gallstones due to sludging and decreased GB peristalsis. can lead to cholecystitis
chronic DIC
FOund in malignancy, can cause migratory thrombophlebitis and atypical venous thromboses
How to test for chronic pancreatitis
Fecal elastase to test for exocrine failure
VIPoma sxs
Pancreatic cholera
Unexplained chornic abd. pain, weight loss, and food aversion
Chronic mesenteric ischemia
Chronic mesenteric ischemia supporting signs
Atherosclerosis, psosible abdominal bruit
Lactose intolerance test
Positive hydrogen breath test, positive stool test for reducing substances, low stool pH, and increased stool osmotic gap. No steatorrhea
Antibiotic associated idarrhea is always
cdiff. use cytotoxin assay
most common causes of painless GI bleeding in >65
Diverticulosis and angiodysplasia
Angiodysplasia associated with
aortic stenosis
D-xylose absorption test
Abnormal in bacterial overgrowth and celiac sprue. With bacterial overgrowth, it normalizes with abx
Iron defieincy anemia and celiacs?
Yes, one of th emost common presentations
Chronic pancreatitis can lead to
Pancreatic cancer
HIV chronic diarrhea CD4<180
cryptosporidium parvum
Carcinoid syndrome triad
Flushing, wheezing, diarrhea
Alarm signals of GERD
N/V, weight loss, anemia, melena/hematochezia, long duration of symptoms especially when white male>45, failure to respond to PPIs
Rocky mountain or foreign country diarrhea
Giardiasis, causes adhesive disks and malabsorption
Abd. surgery complication leading to malabsorption
Bacterial overgrowth
ZE syndrome can cause malabsorption how
Inactivation of pancreatic enzymes
Best dx and evaluation for diverticulitis
CT
Carcinoid syndrome nutrient deficiency
Niacin from 5HT production
MENI tumors
Primary hyperPTH, pituitary tumors, and enteropancreatic tumors (GASTRINOMA)
When to do esophagoscopy for GERD
When patient fails to respond to PPI tehrapy or the scary signs pop up
Initial test for all dysphagia
Barium swallow
Young person with chronic diarrhea, abd. pain, and weight loss
Crohn’s
Digoxin toxicity can be caused by this
Verapamil
Digoxin toxicity sxs
GI, anorexia, N/V
Tx for zenker’s
Cricopharyngeal myotomy.
BUN>40 in presence of normal Cr
Upper GI bleed. or steroids
Whipple’s disease presentation
Arthralgias, weight loss, fever, diarrhea, and abd. pain. PAS positive stain
Tropical sprue biopsy
blunting of villi with infiltration of chronic inflammatory cells, including lymphocytes, plasma cells, and eosinophils
How to dx zenker’s
Barium swallow
Dx of steatorrhea
quantitative estimatino of stool fat
Corkscrew esophagus on barium swallow
Diffuse esophageal spasm
When to think of diffuse esophageal spasm
Young female with intermittent chest pain and dysphagia
Diffuse esophageal spasm tx
Supportive, nitrates and CCBs?
WHen to tx Hep B
Persistently elevated ALT levels, detectable HBsAg, HBeAg, and HBV DNA should be treated with interferon and lamivudine
Recurrent pancreatitis with no clear cause w/u
ERCP
Most common cause of pancreatitis in men and women
Men: alcoholism, Women: gallstones
Liver metastases most commonly caused by
GI tract tumors, lung, breast