PMC5968287_01
Case 1. a Contrast-enhanced CT reveals a huge renal cyst (*) before drainage. b Contrast-enhanced CT shows intracystic bleeding (arrow) after initial drainage of the cyst. c Renal artery angiography displays well-developed feeding arteries supplying the renal cyst (arrows). d Radiograph shows microcoils (arrows) after TAE. e CT reveals involution of the cyst (*) after treatment. CT, computed tomography; TAE, transcatheter arterial embolization.
cnd-0008-0082-g01.jpg
PMC5968287_01_cnd-0008-0082-g01.jpg
F1
The cyst walls were thin, and the lesion was sharply delineated from the renal parenchyma, so it was categorized as a category I cyst according to the Bosniak classification (Fig. 1a). CT revealed intracystic bleeding (Fig. 1b). Angiography showed elongated and narrow branches of the right renal artery encircling the huge cyst (Fig. 1c). TAE was performed using 28 platinum microcoils according to the previously reported method, achieving occlusion of the feeding arteries while preserving the residual right kidney parenchyma (Fig. 1d). Two years later, her cyst was reduced to dimensions of 6 x 4 x 4 cm with a volume of 75.4 mL (Fig. 1e).
PMC5968287_02
Case 2. a Axial contrast-enhanced CT shows 4 huge renal cysts in the left kidney. (*) indicates the largest cyst. b On coronal CT, huge cysts occupy the abdominal cavity. (*) indicates the largest cyst. c Renal artery angiography reveals well-developed feeding arteries supplying the renal cysts (arrows). d Radiograph shows microcoils (arrows) after TAE. e CT displays involution of the largest cyst (*) after treatment. CT, computed tomography; TAE, transcatheter arterial embolization.
cnd-0008-0082-g02.jpg
PMC5968287_02_cnd-0008-0082-g02.jpg
F2
The total volume of the 4 cysts was 9,215 mL, and all cysts were Bosniak category I (Fig. 2a, b). A total of 8 platinum microcoils were used to block the branches of the left renal artery encircling the cyst walls (Fig. 2c, d). After 1 year, the total cyst volume was decreased to 633 mL (Fig. 2e).