Biliary Tract Imaging — Flashcards

Flashcard 1: 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 2: CT scan appearance of _____ sign is a feature of pyogenic hepatic abscesses.

Answer: cluster

Flashcard 3: Christmas tree bladder or pine cone bladder is a cystogram appearance which is usually seen in severe _____ with increased sphincter tone.

Answer: Neurogenic bladder

Flashcard 4: _____ triad is seen in gallstone ileus

Answer: Rigler's

Flashcard 5: _____ is the best imaging modality for hydatid cyst

Answer: Ultrasonography (USG)

Extra: Ultrasonography is the investigation of choice (IOC) for hydatid cysts, particularly hepatic ones. It is highly sensitive for characterizing internal morphology (daughter cysts, floating membranes, hydatid sand) and is the basis for the WHO/Gharbi classification. **Note on CT scan:** While CT has very high sensitivity (approaching 100%) and is superior for detecting wall calcifications and pre-operative mapping, USG remains the primary diagnostic and staging tool.

Flashcard 6: The definitive radiographic study for Budd Chiari syndrome is _____

Answer: hepatic venography

Flashcard 7: Endoscopic cholangiography shows linear filling defects in the bile ducts due to _____.

Answer: Ascaris worms

Flashcard 8: What is the initial procedure of choice in investigating possible biliary tract obstruction (if USG is not possible)?_____

Answer: CT scan

Flashcard 9: The given image shows the presence of a _____ in lower end of esophagus.

Answer: Schatzki’s ring

Flashcard 10: The given Retrograde ureterogram showing dilated clubbed calyces with stricture of the left ureteropelvic junction is suggestive of _____

Answer: Hydronephrosis