| Riehl's melanosis | A brown pigmentary condition of the exposed portions of the skin of the neck and face with melanin pigment in dermal macrophages, thought to result from photodermatitis due to materials, such as cosmetic ingredients, or oils encountered in various occupations. (05 Mar 2000) |
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| precancerous melanosis of Dubreuilh | An obsolete term for lentigo maligna. (05 Mar 2000) |
| neurocutaneous melanosis | Cutaneous giant pigmented nevi associated with melanosis of the leptomeninges; malignant melanomas may develop in the skin or meninges. (05 Mar 2000) |
| oculodermal melanosis | Pigmentation of the conjunctiva and skin around the eye, usually unilateral; seen especially in women of Oriental races. Synonym: Ota's nevus. (05 Mar 2000) |