PMC5192244_01
Per anal examination showing the exophytic mass of 2 cm arising from the anal canal at 7'o clock position.
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On examination, there was an oval mass of 2 cm diameter at the anal margin, greyish white in appearance, at 7 o'clock position (Fig. 1).
Histopathological examination showing spindle shaped tumor cells arranged in diverging bundles. The cells have clear vacuoles. (H&E 200).
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The tumor cells were spindle shaped, arranged in bundles with many atypical cells with multiple nuclei, and frequent mitosis (30 per 10 high power field) (Fig. 2).
Immunohistochemistry showing intense nuclear and cytoplasmic CD117 staining of tumor cells.
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On immunohistochemistry, the tumor cells positively stained for the CD 117 (c kit) (Fig. 3).