Large expansile multiloculated cystic mass of the left iliac bone, extending to the acetabular roof with cortical thinning and destruction. The cystic matrix shows a variable density (from 5 to 25 HU) with areas of calcification and no enhancement seen on postcontrast images. Others multiloculated intramuscular cysts (some of them are partially calcified) of the left external oblique, iliopsoas, obturator internus and gluteus medius muscles as well as subcutaneous adjacent to the left gluteus medius muscle.