| • | AKA reticulate pigmented anomaly of the flexures |
| • | autosomal dominant; presents in adult life |
| • | axilla and groin most often |
| • | vs. Habers disease: rosacea of the face in addition |
| • | “classic ddx”: AN vs. Gougerot-Carteaud vs. Dowling-Degos dz |
histology:
| • | diagnostic; a distinctive form of acanthosis, characterized by an irregular elongation of the thin, branching, rete ridges (described as “antlers”; look like adenoidal seborrheic keratosis) with a concentration of melanin at the tips |
| • | histology distinguishes from AN and axillary freckling of neurofibromatosis |
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