Expert Reviews in Molecular Medicine: http://www.expertreviews.org/
Accession information: DOI: 10.1017/S1462399402005124; 19 November 2002
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The NorwoodöHamilton scale of male-pattern baldness

Justine A. Ellis, Rodney Sinclair and Stephen B. Harrap

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Figure 1. The Norwood–Hamilton scale of male-pattern baldness. The typical pattern of hair loss is divided into seven categories. No hair loss is termed ‘type I’. Minor recession of the frontal hairline is termed ‘type II’. Type III indicates further frontal loss, and is considered ‘cosmetically significant’. The subset of type III, termed ‘III vertex’, shows significant frontal recession coupled with hair loss from the vertex region of the scalp. Types IV–VI show further frontal and vertex loss, culminating in type VII, in which only the occipital scalp region maintains significant amounts of hair. Reproduced from Norwood, O.T. (1973) Hair Transplant Surgery (1st edition), courtesy of Charles C. Thomas, Publisher, Ltd, Springfield, Illinois, USA (fig001jem).

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