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CHRONIC DISCOID LUPUS ERYTHEMATOSUS IN THAILAND: DIRECT IMMUNOFLUORESCENCE STUDY
Author(s) -
KULTHANAN KANOKVALAI,
ROONGPHIBOOLSOPIT PAISAL,
CHANJANAKIJSKUL SOMCHAI,
KULLAVANIJAYA PREYA
Publication year - 1996
Publication title -
international journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 93
eISSN - 1365-4632
pISSN - 0011-9059
DOI - 10.1111/j.1365-4362.1996.tb00643.x
Subject(s) - medicine , dermatology , discoid lupus erythematosus , lupus erythematosus , immunofluorescence , direct fluorescent antibody , cutaneous lupus erythematosus , immunology , antibody
Background. Studies of chronic discoid lupus erythematosus (DLE) lesions by direct immunofluorescence (DIF) were heterogeneous with respect to classes of immunoglobulins and sites where these were deposited. Most of the studies were done in the USA and European countries. Materials and Methods. To obtain representative data from Asiatic countries, we analyzed the direct immunofluorescent abnormalities of 100 DLE lesions in Thai patients who were diagnosed on the basis of clinical and histologic criteria. Results. Granular deposits at the dermoepidermal junction (DEJ) were detected in 90% of cases. The common immunoreactants at the DEJ were IgG (63%) and IgM (47%). The deposits were usually combinations of various classes of immunoglobulins, mostly IgG (53%) and IgM (41%). Deposits of IgG and IgM alone at the DEJ were observed in 12% and 8%, respectively. Deposits at colloid bodies, dermal blood vessel walls, and epidermal nuclei were sometimes also seen. Conclusions. The DIF test of skin biopsy specimens is diagnostically significant in chronic DLE. Our study in Thai patients showed that the most common deposit was a combination of various classes of immunoglobulins, mostly IgG and often IgM as well as C3, and occurred at the DEJ of the involved area.