Osteoma cutis 2016-08-26T12:11:51Z The term osteoma refers to the anomalous presence of ossification (bone formation) in the interior of the dermis or epidermis. The dermal or subcutaneous bone formation presents as stony hard nodules. The osteomata appear as irregular, hardened small nodules that are well circumscribed and generally of the same color as the skin. Osteomatosis Cutaneous osteosis Miliary osteoma Skin nodule