Background:
@EN Becker's nevus is a benign lesion that may be congenital or acquired, macular or papular, hairless or hypertrichotic.
@ES Objective:
@EN Our purpose was to describe the clinical findings of Becker's nevus and to establish a mehod for the histologic diagnosis of Becker's nevus.
@ES Methods:
@EN We reviewed 28 skin biopsies and their clinical findings from 28 patients with Becker's nevus during a 10 year period from January 1981 to January 1991.
@ES Results: The results were summarized as follows.
@EN A. Clinical characteristics
1. Sex disttribution showed a male predominence with male: female a ratio of 1.5:1. Age of onset was predominent in less that 5 years old and puberty.
2. The lesions were located on the trunk(24 cases). head & neck(8 cases), extremities(6 cases), and were ipsilateral in 26 cases, bilateral in 2 cases.
3. The lesions were accompanied by hair in 17 cases(61%). The shapes of the lesions were reticulated (75%), patch(18%), mottled(7%).
4. Hairs were distributed as follows: abdomen(100%), scapula(100%), extremities (83%), cheek(80%), neck(67%), chest(40%). All lesions of the face had follicular papules.
5. Associated skin diseases were: smooth muscle hamartoma(3 cases), striae distensa (2 cases), steroid acne(2 cases), pigmented nevus(2 cases), and verruca plana(1 case).
@ES B. Histopathologic characteristics
@EN 1. The lesions were accompanied with plugs in 21 cases, which were follicular, acrosyringeal, epidermal.
2. Elongation of the rete ridge and hyperpigmented basal cells were observed in the epidermis in all cases.
3. The shape of the rete ridge in Becker's nevus has its characteristic appearance, which is single, bridging and reticulated. Single, bridging and reticulated shapes coexisted in 17 cases(61%).
4. Inflammatiry cell infiltrations were present in all of the upper dermis, in which melanophages(21%), hair follicles(89%) and smooth muscle hamartoma(3cases) were observed.
@ES Conclusion:
@EN these findings indicated that the shape of the rete ridge in Becker's nevus has its characteristic appearance and can be useful for the diagnosis Becker's nevus.
(Kor J Dermatol 1993;31(4):539~547)
|