Table 1: Classification of true leukonychia.

(A) Hereditary
(1) Isolated
(2) Associated with
(a) Bart-Pumphrey syndrome
(b) Bauer syndrome
(c) Heimler syndrome
(d) Knuckle pads-leukonychia-deafness syndrome
(e) Keratoderma, hypotrichosis and leukonychia totalis
(f) Lowry-Wood syndrome
(g) FLOTCH syndrome
(h) Congenital keratosis palmaris et plantaris, deafness
and total leukonychia
(i) LEOPARD syndrome
(B) Acquired
(1) Idiopathic
(2) Associated with
(a) Trauma
(b) Drugs
(c) Systemic infections
(d) Local infections
(e) Inflammatory disease.