Koilonychia

Koilonychia
Other names: Spoon nails
Koilonychia
SpecialtyDermatology
SymptomsThin upward curved nails[1]

Koilonychia, also known as spoon nails, are thin upward curved nails.[1][2] Any nail may be affected, although it is seen more frequently in the big toes.[3]

Loss of the normal nail curvature occurs due to the nails being thin.[4] In babies, this is generally normal but in the elderly it may be a sign of iron deficiency anaemia or lichen planus.[5]

Signs and symptoms

In early stages nails may be brittle and chip or break easily.

  • Koilonychia
    Koilonychia
  • Koilonychia
    Koilonychia
  • Koilonychia
    Koilonychia

Causes

Koilonychia is associated with Plummer–Vinson syndrome and iron deficiency anemia. It has also been associated with lichen planus, syphilis, and rheumatic fever.


Terminology

The term is from the Greek: κοῖλος, koilos, "hollow", ὄνυξ, onyx, "nail".

See also

References

  1. 1 2 James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "33. Diseases of the skin appendages". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. p. 781. ISBN 978-0-323-54753-6. Archived from the original on 2023-07-01. Retrieved 2023-05-31.
  2. ↑ Tosti, Antonella (2020). "413. Diseases of hair and nails". In Goldman, Lee; Schafer, Andrew I. (eds.). Goldman-Cecil Medicine. Vol. 2 (26th ed.). Philadelphia: Elsevier. p. 2660. ISBN 978-0-323-53266-2. Archived from the original on 2023-06-30. Retrieved 2023-05-31.
  3. ↑ Bellet, Jane Sanders (2021). "Paediatric nail disorders". In Lipner, Shari (ed.). Nail Disorders: Diagnosis and Management, An Issue of Dermatologic Clinics. Philadelphia: Elsevier. p. 231. ISBN 978-0-323-70923-1. Archived from the original on 2023-07-01. Retrieved 2023-05-31.
  4. ↑ MacGilchrist, Claire (2020). "3. The skin and nails in podiatry". In Burrow, J. Gordon; Rome, Keith; Padhiar, Nat (eds.). Neale's Disorders of the Foot and Ankle (9th ed.). Elsevier. p. 52. ISBN 978-0-7020-6504-0. Archived from the original on 2023-06-30. Retrieved 2023-05-31.
  5. ↑ Berker, David de (2019). "20. Diseases of the nails". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. p. 168. ISBN 978-1-119-48899-6. Archived from the original on 2023-07-01. Retrieved 2023-06-05.
Classification
External resources
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