Abstract
Osteoma cutis is the formation of bone within the skin. It can present as either primary osteoma cutis or secondary osteoma cutis. Secondary osteoma cutis is more common and is associated with inflammatory, infectious, and neoplastic disorders, including basal cell carcinoma. A 79-year-old Caucasian man without underlying kidney disease or calcium abnormalities presented with a basal cell carcinoma with osteoma cutis on the chin. Basal cell carcinoma with osteoma cutis has seldom been described; however, the occurrence of this phenomenon may be more common than suggested by the currently published literature. The preferred treatment is surgical excision—with or without using Mohs micrographic technique. When the histopathologic examination reveals bone formation in the skin, clinicians should consider the possible presence of an adjacent malignancy, such as a basal cell carcinoma.
Highlights
Basal cell carcinoma is the most common type of skin cancer
A 79-yearold man with basal cell carcinoma-associated osteoma cutis is described and other conditions associated with cutaneous ossification are summarized
Osteoma cutis is the development of bone within the skin and can occur as a primary phenomenon or associated with other disorders
Summary
Basal cell carcinoma is the most common type of skin cancer. Osteoma cutis is the formation of bone within the skin; it can occur either as a distinct cutaneous entity or associated with other conditions. Distant (A) and closer (B and C) views of microscopic findings observed on the hematoxylin and eosin stained sections from a punch biopsy of basal cell carcinoma with osteoma cutis from the chin of a 79-yearold Caucasian man. The tumor and associated bone were excised using Mohs micrographic surgery, which is a surgical technique that incorporates the microscopic examination of excised margins to ensure the complete removal of cancerous cells while sparing as much normal skin as possible. It is the most effective technique for the removal of squamous and basal cell cancers. There has been no recurrence to date
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