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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: AJR Am J Roentgenol. 2010 Jun;194(6):1559–1567. doi: 10.2214/AJR.09.3736

Fig. 14.

Fig. 14

46-year-old man with mass in posterior left thigh. Axial CT image with patient in prone position for biopsy shows large cystic mass (arrow) posterior to femur, splaying hamstrings. Pathologic analysis revealed myxoid liposarcoma, which may have soft-tissue or pseudocystic appearance, mimicking intramuscular myxoma. Myxoid as well as pleomorphic liposarcomas may show minimal fat, and approximately 20% of lesions have completely cystic appearance. A cystic-appearing tumor within soft tissues of extremities thus always requires biopsy.