Inclusion Body Fibromatosis : Morphology

Comments:
Gross Pathology: The resected specimens are small, skin-covered solid nodules with a whitish-grey firm cut surface.

Microscopic Features: The lesion is poorly circumscribed and extends into deep dermis and subcutis and surrounds the dermal appendages. The overlying epidermis may show acanthosis or hyperkeratosis. The lesion consists of a uniform population of bland myofibroblastic cells in a dense collagenous stroma.

microscopic features continue in the next image