Subungual Exostosis Quiz

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Yukiko Ueda

Yukiko Ueda, MD (Dermatology)

Dr. Ueda graduated from the Niigata University School of Medicine and trained at the University of Tokyo Medical School. She is currently a clinical assistant professor at the Department of Dermatology, Jichi Medical University, and holds several posts in the dermatology departments at Kyoto Prefectural University of Medicine, Komagome Hospital, University of Tokyo, and the Medical Center of Japan Red Cross Society.

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Learn more about Subungual exostosis

Content updated on Sep 20, 2022

What is subungual exostosis?

Subungual exostosis are benign bony outgrowths from under the nail, of the tip of the toe or finger. In many cases, this happens after some kind of trauma or infection to the area. It is most common amongst children and adolescents.

Symptoms of subungual exostosis

  • Lumps under the skin

  • Red or yellow skin lumps

  • Change in nail shape

Questions your doctor may ask to check for subungual exostosis

Your doctor may ask these questions to diagnose subungual exostosis

  • Do you feel a lump/lumps under your skin?

  • Do you have yellow or red lumps/bumps on your skin?

  • Has your nail shape changed?

Treatment for subungual exostosis

Subungual exostosis can be removed surgically, with the affected toe or finger anesthetized. The bone is scraped clean to prevent future similar outgrowth.

View the symptoms of Subungual exostosis

References

  • Yousefian F, Davis B, Browning JC. Pediatric Subungual Exostosis. Cutis. 2021 Nov;108(5):256-257. doi: 10.12788/cutis.0380. PMID: 35100532.

    https://www.mdedge.com/dermatology/article/248294/pediatrics/pediatric-subungual-exostosis

  • Shah SN. Subungual exostosis. Indian J Pathol Microbiol. 2021 Jul-Sep;64(3):598-599. doi: 10.4103/IJPM.IJPM_656_20. PMID: 34341284.

    https://www.ijpmonline.org/article.asp?issn=0377-4929;year=2021;volume=64;issue=3;spage=598;epage=599;aulast=Shah

  • Vaccaro M, Bartolomeo LD, Cannavo SP. Dupuytren Subungual Exostosis. Indian Pediatr. 2021 Feb 15;58(2):201. PMID: 33632969.

    https://www.indianpediatrics.net/feb2021/201.pdf

  • Tritto M, Mirkin G, Hao X. Subungual Exostosis on the Right Hallux. J Am Podiatr Med Assoc. 2021 Dec 15;111(6). doi: 10.7547/20-209. PMID: 35294159.

    https://japmaonline.org/view/journals/apms/111/6/20-209.xml

Reviewed By:

Yukiko Ueda

Yukiko Ueda, MD (Dermatology)

Dr. Ueda graduated from the Niigata University School of Medicine and trained at the University of Tokyo Medical School. She is currently a clinical assistant professor at the Department of Dermatology, Jichi Medical University, and holds several posts in the dermatology departments at Kyoto Prefectural University of Medicine, Komagome Hospital, University of Tokyo, and the Medical Center of Japan Red Cross Society.

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