Gastrointestinal Tract Flashcards
Abdominal viscera herniate into a ventral membranous sac
Omphalocele
Thin non canalized cord replacing esophagus
MC at tracheal bifurcation
Esophageal atresia
Failed involution of vitelline duct
Rule of 2s
Meckel's diverticulum 2% of the population 2 feet 85 cm of ileocecal valve 2 inches 5 cm long 2x MC in males Age 2
Olive sized abdominal mass
Second or third week of life
Regurgitation and nonbilious vomiting
Hypertrophic pyloric stenosis
Viral esophagitis
HSV
CMV
Punched out ulcers
Shallow ulcerations
Most frequent cause of esophagitis
Simple hyperemia
Basal zone hyperplasia exceeding 20%
Reflux esophagitis
Esophageal adenoca precursor
Barett esophagus
Intestinal goblet cells
Distal third
Sq cell ca of esophagus
Alcohol
Middle third
Proximal duodenal ulcers in burn pts
Curling ulcers
Gastric, duodenal and esophageal ulcers in pts with intracranial disease
Cushing ulcers
Antral gastritis
Pit abscesses
MALT lymphoma
Helicobacter pylori gastritis
Type A vs type B gastritis
Location
Infiltrate
Gastrin
A body macrophages inc
B antrum neutrophils dec
Diffuse mucosal damage and glandular atrophy of oxyntic mucosa
Autoimmune gastritis
MC location of PUD
Prox duodenum
Antrum
Gastric adenoca
Signet ring cells
Mucin lakes
Diffuse infiltrative
Gastric adenoca
Glandular structures
Mucin
Intestinal type
Gastric adenoca
Stiffening of gastric walls
Desmoplastic reaction
Gastric adenoca
Diffuse rugal thickening
Leather bottle appearance
Linitis plastica
Palpable nodules in cul de sac
Blumer’s shelf
Gastric adenoca
MC site of extranodal lymphomas
GI
MC site of GI carcinoid
Ileum
Salt and pepper chromatin
Synaptophysin and chromatogranin markers
Carcinoid
Carney triad
Gastric GIST
Paraganglioma
Pulmonary chondroma
MCC of ischemic bowel disease
Atherosclerosis
Site at greatest risk for transmural infarction
Splenic flexure
MC site of angiodysplasia
Cecum or R colon
Cryptitis
Crypt abscesses
Crypt architecture is preserved
Campylobacter enterocolitis
DOC for chronic carriers of salmonella in gallbladder
Ampicillin
Enlargement of Peyer’s patches
Oval ulcers oriented along ileal axis
Aggregates of macrophages replace small randomly scattered foci of hepatic parenchymal necrosis
Typhoid nodules
Typhoid fever
Salmonella typhi
Diarrhea
Weight loss
Malabsorption
Whipple’s disease
Distended foamy macrophages that contain PAS positive diastase resistant granules
Whipple’s triad
Inflammatory bowel disease
Crohn
Ulcerative Colitis
Crohn any area of GIT transmural
UC colon and rectum mucosa and submucosa
Skip lesions Strictures Thick wall Deep knife like ulcers Marked lymphoid reaction, fibrosis and serositis Granulomas and fistulae Malabsorption Recurrence after surgery
Crohn
Superficial broad ulcers
Malignant potential
Toxic megacolon
UC
Aphthous ulcer
Cobblestone appearance
Paneth cell metaplasia
Non caseating granulomas
Crohn
Extraintestinal
Primary sclerosing cholangitis
UC
Small flasklike outpouchings
Epiploic appendices
Absent muscularis propia in walls
Sigmoid diverticulitis
MC site and sx of juvenile polyp
Rectum
Bleeding
Hamartomatous polyps with arborizing networks
Peutz Jeghers
Mucosal protrusions with serrated architecture without malignant potential
Hyperplastic polyps
Large sessile polyps covered by slender villi in the colon
Villous adenomas
Intestinal polyps
Osteomas of mandible, skull and long bones
Gardner syndrome
Intestinal adenomas
CNS tumors
Turcot syndrome
MC malignancy of GIT
Risk factor
Colorectal adenoca
Diet
Colorectal adenoca
Poor prognosis
Mucin accumulation
R colon ca
L colon ca
IDA
Bowel changes or LLQ pain
MC mets site for colonic adenoca
Liver
Dilation of inf/sup hemorrhoidal plexus
Ext/int
Bacterial peritonitis
E coli
S aureus
C perfringens
SBP absence of an obvious source of contamination
Cirrhosis
E coli
Dull and lusterless peritoneun
Serous or slightly turbid peritoneal fluid
Creamy suppurative material
Peritonitis