Segmented heterochromia in a single scalp hair.

© 2014 The Authors. doi: 10.2340/00015555-1790 Journal Compilation © 2014 Acta Dermato-Venereologica. ISSN 0001-5555 Segmented heterochromia in scalp hair refers to a hair condition resulting in alternating dark and light segments, which predominantly occurs in patients with iron-deficiency anaemia (1, 2). Here, we demonstrate a single hair shaft presenting with alternating black and white bands, which suggests unstable follicular melanocyte viability or a transient interruption of follicular melanogenesis, without any remarkable underlying conditions.

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