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===Microscopic description=== | ===Microscopic description=== | ||
The sections show | The sections show thick collagen bundles in the dermis covered by a flat epidermis with basal hyperpigmentation (dermal scar). This is surrounded by a cellular, poorly demarcated, dermal-based spindle cell lesion with a storiform pattern. There is no significant atypia or mitotic activity. The lesion extends, focally, to the deep margin (block A5) and contains adipose tissue within it (honeycomb pattern). | ||
Immunohistochemical staining show that the lesion is strongly CD34 positive and negative for factor XIIIa. | |||
===Final diagnosis=== | ===Final diagnosis=== | ||
Skin, left abdomen, re-excision:<br> | Skin, left abdomen, re-excision:<br> | ||
DERMATOFIBROSARCOMA PROTUBERANS WITH POSITIVE DEEP MARGIN.<br> | -DERMATOFIBROSARCOMA PROTUBERANS WITH POSITIVE DEEP MARGIN, RE-EXCISION SUGGESTED.<br> | ||
DERMAL SCAR. | -DERMAL SCAR. |
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