Presentation
Progressive painless swelling of the posterior aspect of the left thigh.
Patient Data
There is a large well-defined lobulated cystic mass of intermuscular location with a relatively homogeneous echotexture of the cystic content.
On MRI this cystic mass appears well-circumscribed multilobulated measuring about (16 x 12 x 9 cm) of intermuscular location well-visualized on sagittal/coronal sequences. It elicits a high signal on both T1/T2 with tiny daughter cysts of a higher signal on STIR. The postcontrast sequences show a regular peripheral enhancement. Other small variable-sized cystic masses of similar signal and enhancement are noted proximal to the previous cystic mass and of intra/intermuscular location.
Case Discussion
Ultrasound and MRI features of hydatid cysts of soft tissues.
The chest x-ray and abdominopelvic ultrasound (not shown) were normal in this case.