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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 …
Contributors Both AL-L and TM provided substantial contributions to the conception and design of the work, drafted the work and revised it critically for important intellectual content, approved the final version to be published and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; internally peer reviewed.
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