Relationship of Pityriasis Amiantacea to Psoriasis

Abstract

46 patients with pityriasis amiantacea have been reexamined with regard to the later development of psoriasis and atopic diseases, and their occurrence in first and second degree relatives. HLA antigens of the A, B and C series were also determined. Earlier suggestions of a close association with psoriasis were not confirmed. An association with atopic diseases could not be established. Occurrence of seborrheic dermatitis seems, however, common in patients with pityriasis amiantacea.

Pityriasis amiantacea and Psoriasis

“…The finding of an early age at onset with a rise during adolescence is in close accord with both studies of PA [3,4] and psoriasis [ …”

“…The relationship of PA to psoriasis was investigated by Hersle et al [3], who found an incidence of only 4.3% of psoriasis among 46 patients with PA, and no increased fre quencies of HLA-B13 and Bw/7 typical for early onset of psoriasis. An interpretation of the result is difficult because absenee of such HLA types does not exclude development of psoriasis and, furthermore.…”

“…11 of the 46 patients in the Swedish series had seborrheic dermatitis and Hersle ct al. [3] concluded that PA is an eczematous reac tion.…”

A Research on Clinic and Ethiopathological Factors in Pityriasis Amiantacea

“…Bugüne kadar psöriyazis, seboreik dermatit, liken planus, liken simpleks kronikus, Darier hastalığı, süperfisiyel fungal veya piyojenik enfeksiyonları da içeren çeşitli hastalıklarla birlikteliği bildirilmiştir (2,(4)(5)(6)(7)(8)(9)(10). Etyolojiyi araştırmaya yönelik çalışmalar kısıtlı sayıda bulunmaktadır ve çoğunlukla mikrobiyolojik ve histopatolojik incelemeleri içermemektedir.…”

“…Sebebi bilinmemekle birlikte, çeşitli inflamatuar durumlara karşı saçlı derinin bir reaksiyonu olduğu düşünülmektedir (3). Bugüne kadar psöriyazis, seboreik dermatit, liken planus, liken simpleks kronikus, Darier hastalığı, süperfisiyel fungal veya piyojenik enfeksiyonlarile birlikteliği bildirilmiştir (2,(4)(5)(6)(7)(8)(9)(10). Hastalığa sebep olan faktörlerin bilinmesi, terapötik yaklaşımı belirlemek açısından önemlidir.…”