Plummer's nail is a clinical sign in which there is onycholysis, or separation of the nail from the nail bed, particularly affecting the ring and little fingers. It occurs in patients with thyrotoxicosis. About 5% of hyperthyroid patients display abnormal nail changes. Plummer's nail is also associated with psoriasis, traumatic injury, and allergic contact dermatitis.
The sign is named after Henry Stanley Plummer.
- Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 1-4160-2999-0.
- Heymann, Warren R., ed. (2008). "Chapter 8. "Cutaneous Manifestations of Hyperthyroidism" by Clara-Dina Cokonis et al.". Thyroid Disorders with Cutaneous Manifestations. Springer. p. 76.
- Heymann, Warren R., ed. (2008). "Chapter 9. "Cutaneous Manifestations of Hypothyroidism" by Sandra Kopp, et al.". Thyroid Disorders with Cutaneous Manifestations. Springer. p. 93.
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