Isolated renal hydatid presenting as a complex renal lesion followed by spontaneous hydatiduria

Table 1 Sonographic appearance of hydatid cysts in Gharbi classification[5]

Type I	Well-defined, purely anechoic lesions that may be indistinguishable from simple renal cysts. Multiple echogenic foci due to hydatid sands may be seen in the cyst (22%)
Type II	Focal or diffuse detachment of the inner germinal layer results in a floating membrane inside the cyst (4%)
Type III	Multiseptated cysts with multiple daughter cysts (54%)
Type IV	Heterogeneous, solid appearance with infolded membranes, and internal echoes (12%)
Type V	Solid appearance, calcifications in the cyst wall, and germinative membranes (8%)