Abdominal and Pelvic Radiology — Flashcards

Flashcard 101: IVP in _____ may show a streaky appearance, representing the ectatic collecting ducts

Answer: Autosomal recessive polycystic kidney disease (ARPKD)

Extra: The 'sunburst' or streaky appearance on IVP in ARPKD is due to contrast filling the dilated radially-oriented collecting ducts. Note: Medullary sponge kidney (MSK) also shows linear streaks (paintbrush appearance) due to ectatic collecting ducts in the medullary pyramids.

Flashcard 102: Hypervascular liver lesion with a central scar points to the diagnosis of _____

Answer: Focal Nodular Hyperplasia (FNH)

Extra: Focal Nodular Hyperplasia (FNH) is a benign liver lesion. The characteristic **central stellate scar** typically shows **delayed enhancement** on contrast-enhanced CT or MRI. Contrast this with **Fibrolamellar Hepatocellular Carcinoma**, which also has a central scar, but the scar is usually larger, may contain calcifications, and typically does not enhance.

Flashcard 103: Inverse 3 sign is seen in _____ on barium meal

Answer: pancreatic adenocarcinoma

Flashcard 104: _____ is the investigation of choice in Acute pancreatitis

Answer: Contrast-enhanced CT scan

Flashcard 105: _____ sign is seen in CT because in acute pancreatitis perinephric fat is not involved

Answer: Preserved renal halo

Flashcard 106: Investigation of choice in renal cell carcinoma is _____.

Answer: CECT

Flashcard 107: _____ is the imaging study of choice for the evaluation of lesions arising in the pancreas

Answer: Multidetector computed tomography (CT)

Flashcard 108: What is the initial procedure of choice in investigating possible biliary tract obstruction (if USG is not possible)?_____

Answer: CT scan

Flashcard 109: Renal cysts with multiple class II features, large hyperdense cysts (>3cm), or hyperdense cysts that are totally intrarenal, are classified as Bosniak class _____

Answer: IIF

Flashcard 110: Barium enema showing a narrow distal segment with a transition zone and proximal dilatation is suggestive of _____ disease.

Answer: Hirschsprung