Primary Osteoma Cutis ‐ A case report

Osteoma Cutis is a rare disorder characterized by spontaneous bone formation beneath the skin. The disease can be primary with no preceeding cutaneous lesions or secondary with an underlying cause of cutaneous ossification such as metaplastic reactions to inflammatory, traumatic or neoplastic processes. Osteoma cutis is most often a secondary phenomenon to local tissue alteration or pre‐existing calcification. Primary osteoma cutis is exceedingly rare. Here we present to you a case – a 25 year old gentleman presenting with multiple swellings in the form of hard nodules like calcified tumours of varying sizes over his scalp, extremities, subungual regions, and over almost all the bony prominences of his body since the age of 5 years. The biopsy findings were consistent with Osteoma Cutis. The possible causes for secondary subcutaneous ossification were ruled out with appropriate investigations. Henceforth diagnosing Primary Osteoma Cutis. It can be easily confused with Tumour Cacinosis, which can be differentiated with a biopsy.