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Images in paediatrics
An abnormal thumbnail
  1. Antonia Lloyd-Lavery,
  2. Tess McPherson
  1. Department of Dermatology, Churchill Hospital, Oxford University Hospitals NHS Trust, Oxford, UK
  1. Correspondence to Dr Antonia Lloyd-Lavery, Department of Dermatology, Churchill Hospital, Oxford University Hospitals NHS Trust, Old Road, Oxford, OX3 7LJ, UK; alloydlavery{at}gmail.com

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A 7-year-old boy was referred with a 3-year history of an asymptomatic, longitudinal depression of the right thumbnail. There was no history of trauma. He was otherwise well and taking no regular medications. Interestingly, his father, uncle and grandmother all have similar problems with their thumbnails.

On examination, there was a rough longitudinal groove running the length of his right thumb nail plate with accompanying transverse fissures giving the appearance of an inverted …

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