IM Plat- Gastroenterology Flashcards
A patient complaining of dysphagia underwent barium swallow which revealed a βcorkscrew esophagusβ with tertiary contractions. What is the most likely diagnosis?
Diffuse esophageal spasm
What hormone is secreted by the K cells in the duodenum and stimulates insulin secretion by the pancreas?
GIP
What is the gold standard for the diagnosis of colonic mucosal disease?
Colonoscopy
Using the Child Pugh Score stratification, the cut-off that indicates decompensated cirrhosis is set at?
> or = 7
Duodenal ulcers tend to penetrate this structure when it starts to perforate.
Pancreas
Gastric ulcers tend to penetrate this structure when it starts to perforate.
Left hepatic lobe
What is the diagnostic test of choice for documenting eradication of H. pylori in patients with PUD?
Urea breath test
Give 3 non-invasive tests for the detection of H. pylori in patients with PUD.
Serology
Urea breath test
Stool antigen
A large caliber arteriole that runs immediately beneath the GI mucosa and bleeds through a pinpoint mucosal erosion.
Dieulafoyβs lesion (Persistent Caliber Artery)
What is the most common cause of UGIB?
Bleeding PUD
What is the most common cause of hematochezia in patients >60 years old?
Bleeding colonic diverticulum
What is the most common cause of rectal bleeding in infancy?
Anal fissure
What 3 variables are used to calculate the MELD score for prognosticating patients with liver disease and portal hypertension?
BIC: serum bilirubin, INR and serum Creatinine
What is the most common and most characteristic symptom of liver disease?
Fatigue
A sign of liver disease that results from recannulation of the umbilical vein resulting in collateral veins radiating from the umbilicus.
Caput medusa
What is the best acute measure of hepatic synthetic function?
Clotting factors
Which clotting factor is not synthesized in the liver?
Factor VIII
It is the qualitative marker of HBV replication and relative infectivity.
HBeAg
What is the first antibody to rise in Hepa B infection and is readily demonstrable in the serum within the 1st 1-2 weeks after the appearance of HBsAG?
Anti-HBc
What hormone is secreted by the enterochromaffin cells in the stomach? by the enterochromaffin-like cells?
Serotonin by the EC cells
Histamine by the ECL cells
What is the most sensitive indicator of HCV infection?
HCV RNA
Give the pharmacologic standard of management of chronic Hepatitis C.
Pegylated IFN + Ribavirin
More sensitive serologic indicator of HBV replication than HBEag and is considered a quantitative marker of Hepa B infection.
HBV DNA
What is the most common adverse effect of ribavirin therapy?
Hemolysis
Stores Vitamin A in the liver.
Ito cells
What is the initial and most common histologic response to hepatotoxic stimuli?
Fatty liver
Asterixis and hypoactive reflexes are first manifested at what grade of hepatic encephalopathy?
Grade 2
A CLD patient was noted to have excessive sleepiness but is still arousable. On MSE, he was slightly aggressive and is disoriented to time and place. Neuro PE showed hyperactive reflexes, muscle rigidity and a (+) Babinski sign. Give the grading of hepatic encephalopathy.
Grade 3
Intestinal enzyme that triggers the conversion of pancreatic trypsinogen to trypsin.
Enterokinase
Single best acute measure of hepatic synthetic function and helpful in both the diagnosis and assessing prognosis of acute parenchymal liver disease.
Coagulation factors
Give the 2 antibiotic adjuncts in the management of hepatic encephalopathy.
Neomycin
Metronidazole
Blue-red purple discoloration of the flanks that reflects tissue catabolism of hemoglobin seen in patients with pancreatitis.
Turnerβs sign
What is the most reliable marker if severity and also considered the hallmark of liver disease?
Jaundice
Which serum enzyme is more specific in diagnosing Acute Pancreatitis?
A. Amylase
B. Lipase
B. Lipase
What is the cornerstone of chronic pancreatitis therapy?
Pancreatic enzyme replacement
What is the diagnostic test of choice in those with suspected pancreatitis but serum lipase/amylase are not markedly increased to accepted values to accurately diagnose the condition?
CT Scan
Give the 3 mainstays in the management of Acute Pancreatitis.
- Pain relief (IV Meperidine)
- Hydration (IV fluids and colloids)
- Bowel rest
What is the most frequently involved vessel in pancreatic pseudoaneurysm?
Splenic artery
What is the procedure of choice for the diagnosis of cholelithiasis?
GB Ultrasound
What is the most common location if pancreatic pseudocysts?
Body or Tail (85%)
Which part of the GI tract is spared in Crohnβs disease?
Rectum
This condition is seen in severe attacks of UC wherein the transverse colon is dilated to more than 6 cm with loss of haustrations.
Toxic megacolon
Antibody seen in most patients with Ulcerative colitis? Crohnβs disease?
pANCA in UC; Anti-Saccharomyces cerevisiae antibody (ASCA) in CD
The staging used for perforated diverticular disease?
Hinchey classification system
The type of diverticulum that involves the mucosa through the muscularis propria.
Psedodiverticulum or False diverticulum
Using the Goodsallβs rule, what is the track of an anterior fistula lying more than 3 cm. from the anal verge?
Curved track (similar to posterior fistulas) that opens into the posterior midline of the anal canal
A common complication of cholecystitis in elderly men and patients with DM.
Emphysematous cholecystitis
What is the most commonly used third-gen cephalosphorin used in the treatment of SBP?
Cefotaxime
What are the most frequently cultured organisms in Emphysematous cholecystitis?
Clostridium welchii and Clostridium perfringens
Escherichia coli
Triads: Choledochal cyst
PaJaMa: Abdominal Pain, Jaundice, Abdominal Mass
What is the most feared outcome of porcelain gallbladder thus, requiring prophylactic and/or immediate cholecystectomy?
Carcinoma of the gallbladder
Triads: Cholecystitis
Fever, RUQ pain, Leukocytosis
Triads: Cholangitis
FPJ: Fever, RUQ pain, Jaundice
What is the initial test of choice for massive obscure bleeding?
Angiography
Appendectomy is protective against which inflammatory bowel disease?
Ulcerative colitis
What is the earliest radiologic change of ulcerative colitis seen on single contrast barium enema?
Fine mucosa granularity
What pharmacologic drug was the first biologic therapy approved for Crohnβs disease?
Infliximab: anti-TNF-a
Using the Parkβs classification, what is the most common type of fistula-in-ano?
Intersphincteric (at the dentate line where the anal glands enter the anal canal)
Portal hypertension is defined as the elevation of hepatic venous pressure gradient by ____.
> 5 mmHg
What is the fatal dose of acetaminophen causing fulminant liver disease?
> or = 25 g
What is the initial test of choice in patients suspected of having Budd-Chiari syndrome?
UTZ with Doppler Imaging
What is the gold standard for the diagnosis and management of acute arterial occlusive disease?
Laparotomy
A 40-year old female, s/p appendectomy came in due to a 5-day history of diffuse abdominal pain and distention. Abdominal xray done showed fluid- and gas-filled loops of small intestine arranged in a βstepladder patternβ with air-fluid levels and absence of gas in the colon. What is the most probable diagnosis?
SBO probably secondary to intestinal adhesions
In pregnant patients, appendicitis commonly occurs during what trimester?
Second trimester
What is the most common cause of appendiceal luminal obstruction?
Fecalith