Koilonychia

Aka: Koilonychia, Spoon Nails

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II. Signs

  1. Concave or Spoon shaped nails

III. Causes

  1. Normal finding in infants
    1. Resolves within first 1-2 years of life
  2. Iron Deficiency Anemia
  3. Hypothyroidism
  4. Trauma
  5. Impaired peripheral circulation
  6. Systemic Lupus Erythematosus
  7. Hemochromatosis
  8. Raynaud's Disease
  9. Contact Dermatitis to petroleum-based solvent
  10. Nail-Patella Syndrome (Autosomal Dominant)
    1. Hypoplastic Patella - commonly dislocated
    2. Glaucoma
    3. Renal disease
    4. Musculoskeletal conditions

IV. References

  1. Tully (2012) Am Fam Physician 85(8): 779-87 [PubMed]

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