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Pediatric Board Review
Gastroenterology
20
Biology
Professional
08/06/2013

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Term
Factors dependent on Vitamin K
Definition
Prothrombin,VII, IX, X
Term
TE fistula
Definition
Most common: Blind upper esophageal pouch with lower fistula
Next common: Esophageal atresia without fistula, flat gasless stomach
Least common: H type, often presents later in life
Term
Pill-induced esophagitis
Definition
Mid esophagus commonly
Associated with tetracyclines, NSAIDs, bisphosphonates, potassium
Adhere to esophagus causing local irritation
Term
H. pylori
Definition
Strongly linked to PUD
Test only with urea breath test or endoscopy, not serum testing
Treat with acid blockers, clarithromycin and amoxicillin or metronidazole
Treat only for PUD or MALT
Term
Defects associated with short gut
Definition
Duodenum: iron, folate, calcium
jejunum: no serious effects
ileum: fluid loss, bile salts, B12
Term
Omphalocele
Definition
Defect at the umbilicus containing bowel and organs, covered by membrane
Associated with Beckwith-Wiedemann and trisomies
Can result in midgut volvulus
Term
Alagille syndrome
Definition
AD Pulmonary artery stenosis, cholestasis, butterfly vertebrae, radius/ulna abnormalities, characterstic facies, elevated conjugated bilirubin, intrahepatic duct paucity
Term
Hepatitis A
Definition
RNA virus
fecal-oral transmission, IgM for acute infx, IgG for previous, complications rare
Term
Hepatitis B
Definition
DNA virus
HBs IgG antibody indicates immunity and is first marker to appear
HBcAg antibody (IgM) present during window;indicates previous exposure and is not conferred by the vaccine
HBs antibody appears last
Associated with polyarteritis nodosa, Hep D infection, associated with acute illness, chronic disease can lead to hepatocellular cancer
Term
Hepatitis C
Definition
RNA virus
Most common cause of liver disease and transplant
acute infection usually asymptomatic, chronic form is common and can be asymptomatic, carrier or chronic
Associated with PCT, mixed cryoglobulinemia
Anti-HCV does not confer immunity; confirm with RNA viral load
Term
Gilbert syndrome
Definition
Benign alteration in UDP-GT
Mild indirect hyperbili < 5
Stress, fasting, illness
No treatment required
Term
Crigler-Najjar syndrome
Definition
More severe form of UDP-GT inactivity
Severe indirect hyperbili, kernicterus
Treat with photothx, liver transplant
Term
Dubin-Johnson syndrome
Definition
Defect in conjugated bilirubin transport
Mild conjugated hyperbili
Does not require therapy
Term
Alpha-1-antitrypsin deficiency
Definition
Porgressive liver disease, cirrhosis, cancer, cholestatic jaundice, emphysema
Term
Wilson disease
Definition
AR
Copper metabolism disorder
Eyes, liver, kidneys, brain
Hepatomegaly, hepatitis,neurological symptoms, behavioral changes
Low serum ceruloplasmin, 24 hour urine copper, liver bx (gold standard)
Penicillamine increases copper excretion
Term
Hemochromatosis
Definition
Excessive iron storage
Liver, heart, pacreas, gonads, skin, joints
Adult cirrhosis, bronze diabetes
Treat with phlebotomy
Term
Biliary atresia
Definition
MCC of pediatric liver transplant
Week 2-3 present with acholic stool,dark urine, hepatomegaly, hyperbilirubinemia, elevated alk phos and liver enzymes
Dx with liver biopsy and cholangiogram
Tx with Kasai procedure
At risk for liver failure, ascending cholangitis
Term
Cholecystitis
Definition
Treat with bowel rest
Associated with severe illness, burn
Term
Hydrops of the gallbladder
Definition
Associated with Kawasaki, GAS, fasting, TPN, HSP
Treat the underlying condition
Term
Hepatic tumors
Definition
Usually benign
Most common are hemangiomas, adenomas
Hepatoblastoma most common malignant and is assoc with elevated AFP
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