Solar facial porokeratosis.

Porokeratosis is comprised of a heterogeneous group of disorders that are inherited in autosomally dominant fashion. It has a wide variety of manifestations. In the last ten years, we have treated cases of porokeratosis that don't fit into the well known categories of porokeratosis. For this reason, the present study was carried out. This study included 15 cases whose ages ranged from 19-37 years with a mean +/- SD of 26.93 +/- 4.52. There were 12 females and 3 males. The duration of the disease ranged from 1-10 years with a mean +/- SD of 4 +/- 2.85 years. Their lesions were located only on the face, mostly on the distal part of the nose and the surrounding perinasal area. The number of lesions on each patient ranged from 1-15, with a mean +/- SD of 4.73 +/- 4.35. The morphology of these lesions consisted of papules with a size range from 0.1-1 cm and a warty appearance. They were skin colored and surrounded by a keratotic rim in the form of a collar. The histopathology showed the picture of porokeratosis with cornoid lamellae and additional features characteristic of this disease. We concluded that facial solar porokeratosis is a variant of porokeratosis and is a disease of the nose of young females with a characteristic clinical and histopathological picture.