“…The incidence rate worldwide is approximately 4.2 cases/100,000 births (3). In China Iso-Kikuchi syndrome is often underdiagnosed; we have described here the second sporadic Chinese case and the first Chinese paediatric case (4) Several clinical criteria have been proposed: congenital incidence with sporadic or hereditary transmission, unilateral or bilateral involvement of the fingers (mostly the index fingers, although additional fingers and even toes may be affected), variety in nail appearance, and bone deformities (5). Nail abnormalities have a wide variety of forms, including polyonychia, micronychia, anonychia, hemionychocryptosis, misalignment, and lunular deformity.…”