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Other Resources UpToDate PubMed

Clavus

Contributors: Noah Craft MD, PhD, Lindy P. Fox MD, Lowell A. Goldsmith MD, MPH, Michael D. Tharp MD
Other Resources UpToDate PubMed

Synopsis

Corns (clavi) are keratinous thickenings of the skin of the toes that are caused by repeated friction or pressure to the area. The base of the corn is seen on the surface of the skin while the apex points inward, causing discomfort. Corns are classified as either hard or soft, depending upon their location and appearance. Hard corns typically affect the tops of the toes and are composed of a dense core that presses on sensory nerves, causing extreme pain. Soft corns occur between the toes and are continuously softened by sweat. They are macerated and white in appearance.

Factors that can lead to and exacerbate corns include ill-fitting shoes, not wearing shoes, the bunching up of socks, bony prominences in the feet or other faulty foot mechanics, and repetitive physical activities that stress the skin.

Codes

ICD10CM:
L84 – Corns and callosities

SNOMEDCT:
201038005 – Corn

Look For

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Soft corns may be mistaken for Tinea pedis or Psoriasis.
Hard corns may be mistaken for the following:
  • Plantar wart
  • Common wart
  • Callus lack the dense core found in corns.
  • Porokeratosis
  • Eccrine poroma
  • Foreign body granuloma
  • Palmoplantar keratoderma

Best Tests

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Management Pearls

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Therapy

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References

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Last Updated:09/21/2017
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Patient Information for Clavus
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Contributors: Medical staff writer
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Clavus
A medical illustration showing key findings of Clavus : Macerated skin, Painful skin lesions, Web spaces of toes, Plantar foot
Clinical image of Clavus - imageId=150025. Click to open in gallery.  caption: 'A corn displaying a circumscribed plaque of thickened epidermis with a central scaly papule.'
A corn displaying a circumscribed plaque of thickened epidermis with a central scaly papule.
Copyright © 2024 VisualDx®. All rights reserved.