Presentation
Abdominal pain.
Patient Data
A large partially exophytic hetero-signal mass with internal layer detachment was seen in the upper pole of the left kidney. There is no sign of local invasion to adjacent structures. Gallbladder is not seen (prior surgery).
A large partially exophytic mass with internal layer detachment, wall and internal calcification was seen in the upper pole of the left kidney. Additionally, three cysts with smooth and thin walls, sharp and distinct marginations, and a homogeneous water-density were seen in the left kidney. The largest one is 23 mm in diameter.
Case Discussion
Features on CT scan and MRI are compatible with left renal hydatid cyst (pathology proved).
CT scan is an accurate and sensitive modality for diagnosis of renal hydatid cyst 1 and shows a unilocular or multilocular cyst with or without peripheral calcification. CT scan may also show a detached membrane, a multiloculated cyst with mixed internal density, and daughter cysts with lower density than the maternal matrix 2.
Hydaturia is a pathognomonic sign of renal hydatidosis 2.