| A rare genetic ectodermal dysplasia syndrome with characteristics of sparse to absent scalp hair, eyebrows, and eyelashes (with pili torti when present), widely spaced, conical-shaped teeth with peg-shaped, conical crowns and enamel hypoplasia and palmoplantar hyperkeratosis, associated with partial cutaneous syndactyly in hands and feet. Caused by homozygous or compound heterozygous mutation in the PVRL4 gene (NECTIN4) on chromosome 1q23. |
