An Unusually Shaped Mass Over the Proximal Nail Fold

A 23-year-old man presented with an asymptomatic, progressive growth over the lateral aspect of his left great toenail 1 year prior, directly following a marathon. Physical examination revealed a firm, flesh-colored solitary periungual nodule beneath the eponychium. What is your diagnosis?

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Publication Details

Journal
JAMA Dermatology
Published
2026-10-28
DOI
https://doi.org/10.1001/jamadermatol.2026.4222
Primary Topic
Cancer and Skin Lesions
Type
article
Field-Weighted Citation Impact
0.00
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article

An Unusually Shaped Mass Over the Proximal Nail Fold

Lai Kuan Chooi, Ashwin Raghavan
JAMA Dermatology
Cancer and Skin Lesions
article

An Unusually Shaped Mass Over the Proximal Nail Fold

Lai Kuan Chooi, Ashwin Raghavan
article en

Abstract

A 23-year-old man presented with an asymptomatic, progressive growth over the lateral aspect of his left great toenail 1 year prior, directly following a marathon. Physical examination revealed a firm, flesh-colored solitary periungual nodule beneath the eponychium. What is your diagnosis?

JAMA Dermatology
Hospital Sungai Buloh (MY)
Good health and well-being
Openalex Percentile: Top 10%
Cancer and Skin Lesions
DOISourceOpenAlex
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An Unusually Shaped Mass Over the Proximal Nail Fold — Lai Kuan Chooi, Ashwin Raghavan · JAMA Dermatology (2026) | TGRS Research Map | TGRS