Associations with human leukocyte antigen (HLA)–DR5, HLA-DRW6, and HLA-Cw6 have also been reported. [11, 12] Etiology A definitive cause has not been elucidated, but lesions
[emedicine.com]
[…] combination with conditions such as chronic granulomatous disease, fissured tongue and psoriasis. [4], [5] Unknown causes, allergic rhinitis, asthma, human leukocyte antigens (HLA-DR5
[njgp.org]
HLADRW6, and HLA-CW6), congenital condition, atopy, inflammation, and polygenic mode are postulated causes. [3], [6], [7], [8], [9], [10] Usually the condition is asymptomatic
[njgp.org]