A Case of Lichen Amyloidosis Associated with Pdoriasis.
- Author:
Jai Il YOON
1
;
Seok Beom PARK
;
Sang Duck KIM
Author Information
1. Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
- Publication Type:Case Report
- Keywords:
Lichen amyloidosis;
Psoriasis;
Pruritus
- MeSH:
Aged;
Amyloidosis*;
Ankle;
Diagnosis;
Hand;
Humans;
Knee;
Lichens*;
Periodic Acid;
Plaque, Amyloid;
Pruritus;
Psoriasis;
Thigh
- From:Korean Journal of Dermatology
1999;37(7):922-925
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Psoriasis is merely recognized as a disorder associated with pruritus. But in some cases, psoriasis does induce pruritus which could alter the daily lives of the people affected. Pruritus in psoriasis has been reported to be influenced by various external and internal factors and as a consequence, aggravation of psoriasis is possible by scratching due to the well-known Koebners phenomenen. Lichen amyloidosis, on the other hand, appears as multiple papules with intense pruritus. Recently, there are some evidence emphasizing pruritus as a main factor in forming amyloid deposits. We report a case of 65-year-old lady who was suffering psoriasis for 25 years with associated pruritic papular lesions on both of her thighs, knees and ankles. The diagnosis of Lichen amyloidosis was confirmed by Periodic Acid Schiff and Dylon stain. We discuss the role of pruritus in lichen amyloidosis and psoriasis and speculate that pruritus induced by lichen amyloidosis may induce a vicious cycle in aggravating psoriasis.
