<unk>  is a form of hyperpigmentation associated with increased melanin. It can also refer to: * Melanism * Ocular<unk>  * Smoker's<unk>  * Oral<unk>  * Riehl<unk>
Melanosis
Melasma
Blue nevus
Neurocutaneous melanosis
Ocular melanosis
Tar melanosis
Ichthyosis
Phimosis