HL-A antigens in lichen planus

Abstract
A study of 57 patients with lichen planus showed a significant increase in the frequency of HL-A3 (54% compared with 29.7% in a control population). There is probably a gene in the HL-A chromosomal region increasing the susceptibility to lichen planus. No correlation was found between HL-A3 and age of onset, sex or presence or absence of mucosal lesions.