PMC4421102_01
MR images of the lesion. (a, b) Axial, T1-weighted images with gadolinium enhancement and fat saturation. (c) Sagittal, T2-weighted image. The lesion (asterisk) has low signal on T1W images and high signal on T2W image. There is minimal contrast enhancement. The lesion causes anterior displacement of the uterus (arrows (a, c)). On (b), the downward extension of the lesion into the ischiorectal fossa is evident.
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fig1
Moreover, ultrasonography of the perineum showed a large mass with peripheral vascularity, heterogenous hyperechoic areas, measuring approximately 26 x 21 x 6 cm, and magnetic resonance (MRI) of the pelvis confirmed these features (Figures 1(a), 1(b), and 1(c)).
Spindle and stellate-shaped cells embedded in a myxoid matrix. Presence of variable-sized thin-walled capillaries and thick-walled vascular channels (H-E x100).
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fig2
Neoplastic cells had relatively scant eosinophilic cytoplasm and their nuclei were ovoid, containing finely dispersed chromatin with one or two small eosinophilic nucleoli (Figure 2).
Tumor cells positive for desmin (desmin x200).
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Immunohistochemically, the tumour cells were positive for vimentin, actin, desmin, and progesterone but negative for S100 protein, CEA, CKAE1/AE3, factor VIII (Figures 3 and 4).
Tumor cells positive for vimentin (vimentin x200).
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fig4
Immunohistochemically, the tumour cells were positive for vimentin, actin, desmin, and progesterone but negative for S100 protein, CEA, CKAE1/AE3, factor VIII (Figures 3 and 4).