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Arch Dermatol. 2007;143(1):109-114.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Platelike osteoma cutis.

MICROSCOPIC AND LABORATORY FINDINGS

Histologic evaluation showed lamellar bone with a fatty marrow that extended from the midreticular dermis into the subcutaneous fat. Haversian canals and numerous osteoblasts were present. Polarization showed birefringence consistent with lamellar ossification. A general physical examination of the patient revealed no abnormalities. The results of laboratory investigations, including circulating levels of calcium, phosphorus, and parathyroid hormone; a complete blood cell count; urinalysis; and serum chemistry studies, were normal.

DISCUSSION

Osteoma cutis is an uncommon occurrence. Cutaneous ossification is classified as either primary or secondary.¹ Secondary cutaneous bone formation represents about 85% of dermal mineralization; however, mature bone formation is not observed.^2-3 Primary osteoma cutis, which represents true bone amartothic formation and typically demonstrates mature lamellar and/or osteonic bone, is infrequently encountered; only 10 primary osteomas were identified in a review of 20 000 consecutive skin biopsy specimens.^{2, 4-5} Circulating levels of calcium and phosphorus are normal, and the cutaneous bone arises idiopathically . . . [Full Text of this Article]

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Arch Dermatol. 2007;143(1):109-114.
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