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Hereditary brachyonychia - Nail and Distal Digit
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Hereditary brachyonychia - Nail and Distal Digit

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Contributors: Bertrand Richert MD, Robert Baran MD
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Synopsis

The term brachyonychia (racquet nail) refers to a short nail in which its width is greater than its length. The nail may also have prominent ridges, pigmentation, and an underlying shortened distal phalanx. Hereditary brachyonychia should be distinguished from the acquired form, which is typically secondary to onychophagia (nail biting) or, less frequently, due to underlying bone resorption in hyperparathyroidism and psoriatic arthropathy. Hereditary brachyonychia is due to the premature obliteration of the epiphyseal line of both thumbs. It is usually inherited as an autosomal dominant trait and may be associated with other congenital anomalies including facial abnormalities and intellectual disability. The female to male ratio is 3:1.

Codes

ICD10CM:
L60.8 – Other nail disorders

SNOMEDCT:
247488004 – Brachyonychia

Look For

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Acquired brachyonychia
  • Pseudobrachyonychia occurs secondary to a thickened and large cuticle that extends on the nail and mimics brachyonychia.

Best Tests

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Management Pearls

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Therapy

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References

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Last Updated: 10/01/2018
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Hereditary brachyonychia - Nail and Distal Digit
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Hereditary brachyonychia : Broad nail and/or distal digit, Shortened distal phalanx, Solitary nail or digit, Thumb
Clinical image of Hereditary brachyonychia
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