Fig 1

Image findings. a A T2-weighted coronal view magnetic resonance image (MRI) of the right thigh shows a cystic lesion mainly involving the anterior compartment, especially the sartorius muscle (an arrowhead). b A T2-weighted axial view MRI reveals lesions mainly involving the medial compartment along the fascia of the hamstring muscles (an arrowhead). c A T2-weighted coronal view of MRI of the right calf shows multiloculated and lobulated lesions mainly involving the posterior compartment (arrowheads). d A T2-weighted axial view MRI reveals a lesion along the superficial fascia (arrowheads). e A coronal view abdominal computed tomography scan shows a large multiloculated cystic mass occupying the right retroperitoneal space (arrowheads)