Intended for healthcare professionals

Endgames Spot Diagnosis

A white ring around a naevus

BMJ 2019; 364 doi: (Published 14 March 2019) Cite this as: BMJ 2019;364:l997
  1. Fei Han, dermatologist1,
  2. Fei Wang, dermatologist2
  1. 1Department of Dermatology, Suqian First Hospital, Suqian City, Jiangsu Province, China
  2. 2Department of Dermatology, Zhongda Hospital, Southeast University, Nanjing City, Jiangsu Province, China
  1. Correspondence to Fei Han, srhanfei{at}

A 23 year old man presented with a white ring around a congenital melanocytic naevus on the left cheek. The white ring had been present for three months. The naevus, present at birth, had grown relatively proportionally with the patient and became hairy when he reached 14. Examination revealed a dark brown, smooth, regular, well demarcated hairy naevus measuring 1.2 cm×0.8 cm in diameter, surrounded by a 0.3-0.8 cm white ring of depigmented skin below …

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