<unk>  () is a cutaneous condition characterized by hyperpigmentation of the oral mucosa, longitudinal melanonychia, and genital melanosis. The hyperpigmentation presented in<unk>  is benign and should be differentiated from Peutz-Jeghers syndrome.
Laugier–Hunziker syndrome
Grinspan's syndrome
Hapnes Boman Skeie syndrome
Zamzam–Sheriff–Phillips syndrome
Lucey–Driscoll syndrome
Maroteaux–Lamy syndrome
Grisel's syndrome
Witteveen–Kolk syndrome