MedGen

A rare, genetic, chronic, recurrent, slowly progressive, epidermal disease characterized by small, sterile, pustular eruptions, involving the nails and surrounding skin of the fingers and/or toes, which coalesce and burst, leaving erythematous, atrophic skin where new pustules develop. Onychodystrophy is frequently associated and anonychia and osteolysis are reported in severe cases. Local expansion (to involve the hands, forearms and/or feet) and involvement of mucosal surfaces (e.g. conjunctiva, tongue, urethra) may be observed. [from ORDO]

An anomaly of the tongue characterized by loss (atrophy) of filiform papillae of the tongue, leaving areas of erythema (redness), surrounded by a serpiginous, white, hyperkeratotic border. The name geographic tongue refers to an appearance that is said to be similar to a map. [from HPO]