Characterized by dark, velvety, thickened skin with a papillomatous (warty) texture in the axillae and neck, associated with insulin resistance.
A rare condition of colored sweat (apocrine chromhidrosis) that can stain the skin and clothing yellow, blue, or black in the axillae.
A genetic disorder presenting as a unique pattern of reticulated (net-like) brown-black hyperpigmentation in the axillae and other flexures.
A bacterial infection causing well-demarcated, reddish-brown patches with fine scale that fluoresce coral-red under a Wood's lamp.
A rare variant of Dowling-Degos disease that combines the reticulated hyperpigmentation with a suprabasal acantholysis on histology, leading to scaly or papular lesions.
Darkening of the skin that occurs after an inflammatory process (like eczema or intertrigo) has resolved in the skin folds.
