GAMUT G-108
NONVISUALIZATION OF THE GALLBLADDER (Ultrasound, CT, NM)


COMMON
1. [Calcified gallbladder wall (porcelain gallbladder); milk of calcium bile]
2. Cholecystitis (acute or chronic; gangrenous; emphysematous )
3. Contracted gallbladder (esp. postprandial)
4. Prior cholecystectomy
5. Technical factors, esp. on ultrasound (eg, gallbladder obscured by gas; obese patient or thin patient with superficial gallbladder)


UNCOMMON
1. [Anomalous position of gallbladder (eg, ectopic gallbladder; situs inversus)]
2. Biliary atresia
3. Carcinoma of gallbladder 
4. Compression by adjacent mass
5. Congenital absence or hypoplasia
6. Fibrosis of gallbladder
7. Hepatization of the gallbladder (sludge-filled)
8. Hyperalimentation; nonfasting patient
9. Metastatic disease involving gallbladder
10. Pregnancy (last trimester)
11. Syndromes (eg, Dubin-Johnson S.; Kawasaki S. {mucocutaneous lymph node S.}; Mirizzi S.)


[    ] This condition does not actually cause the gamuted imaging finding, but can produce imaging changes that simulate it.




References