S13C15P13-1: The lesion is polypoid and lobulated. The lobules are composed of blood-filled, vascular spaces that vary in size. The lumina are closely spaced in a scanty stroma of uniform spindle cells. At the margins of the polypoid portion, the epidermis is hyperplastic. Over the lesion, the epidermis shows effacement of rete ridges.

S13C15P13-2: The vascular patterns have a cavernous quality. The spindle cell stroma is partitioned by slit-like spaces. Focally, the spindle cell component is hemorrhagic; there are red blood cells in slit-like spaces. In the area showing the cavernous spaces, the patterns are compatible with the angiomatous variant of Kaposi hemorrhagic sarcoma. A lesion showing rather uniform cavernous patterns commonly is misdiagnosed as an hemangioma.

S13C15P13-3: In this portion of the lesion, the spindle-cell, stromal component is well represented. Round, and slit-like, spaces among the spindle cells contain red blood cells. The pattern is in keeping with a solid variant of Kaposi’s hemorrhagic sarcoma in this field.

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