Keratoacanthoma centrifugum marginatum

Keratoacanthoma centrifugum marginatum (KCM) is an uncommon variant of keratoacanthoma. marginatums are most commonly seen on sun-exposed surfaces and present with progressive peripheral expansion raised, hyperkeratotic borders. Central clearing atrophy lack spontaneous clearance other key clinical characteristics. The majority cases benign a low risk metastasis. size such growths variable reported ranging from 5.0cm×5.0cm to as large 20.0cm×14.0cm. Treatment options include surgical excision, oral retinoids, intralesional chemotherapeutics methotrexate or bleomycin. We herein case KCM manifesting exophytic, crateriform plaque in 61-year-old man.