PMC5467340_01
Magnetic resonance imaging revealed a tumor mass measuring 13 x 15 x 24 cm located in the left posterior thigh. Almost all the muscles, except the rectus femoris, sartorius, and gracilis muscles, show lipomatous changes. T1- and T2-weighted images (WIs) T2-WI, and short-TI inversion recovery (STIR) images show high intensity. Coronal T2-WI (a), T1-WI (axial view) (b), T2-WI (axial view) (c), and STIR images (axial view) (d).
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Magnetic resonance imaging (MRI) revealed high signal intensity on T1- and T2-weighted images and heterogeneous hyperintensity on short-TI inversion recovery images (Figure 1).
Macroscopic appearance of the resected tumor. The mass includes the semitendinosus muscle, semimembranosus muscle, and biceps femoris muscle.
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We performed marginal resection including the semitendinosus muscle, semimembranosus muscle, and biceps femoris muscle (Figure 2).
Pathological findings show mature adipocytes with cellular atypia and marked variations in size and shape. Hematoxylin-eosin staining, x25. Scale bar, 1 mm.
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Pathological examination revealed that it contained mature adipocytes with cellular atypia (Figure 3).