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A man with infiltrated and indurated plaque on the forehead

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Unknown: A man with infiltrated and indurated plaque on the forehead
J Aneiros-Fernandez MD1, H Husein-ElAhmed MD2, J Orgaz-Molina MD2, F O'Valle Ravassa MD PhD1, S Arias-Santiago MD2
Dermatology Online Journal 16 (6): 12

1. Department of Pathology, University Hospital, Granada, Spain.
2. Department of Dermatology, University Hospital, Granada, Spain

Figure 1 Figure 2
Figure 1. Exophytic lesion of the scalp

Figure 2. Well-circumscribed nodules of mature lamellar bone surrounded by connective tissue and containing marrow spaces can be observed (H&E, panoramic)

Figure 3
Figure 3. Higher magnification reveals transepidermal elimination (H&E, x100)

A 25-year-old man presented with multiple nodules involving the left forehead. The lesions had been present for 1½ years and had grown progressively. Clinical examination revealed a 2 cm infiltrated and indurated asymptomatic plaque on the forehead (Figure 1). The rest of his cutaneous exam was normal. The patient denied any history of local trauma or acne vulgaris and the previous endocrine evaluation did not show any hormone alterations. Histologic sections are shown in Figures 2 and 3.

What is your diagnosis?


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