TITLE:
A Case Report of Collagenous Fibroma of the Fingernail
AUTHORS:
Alwi Fauzi Ahmed, Liming Wu, Jianbo Zhong
KEYWORDS:
Collagenous Fibroma, Nail
JOURNAL NAME:
Open Access Library Journal,
Vol.13 No.1,
January
21,
2026
ABSTRACT: Background: Collagenous Fibroma (CF) of the nail, particularly the finger, is exceedingly uncommon. Although uncommon, they should be included in the differential diagnosis of nail abnormalities. Early diagnosis and complete surgical excision lead to an excellent prognosis with a minimal risk of recurrence. Objective: To raise awareness of the rarity of this condition to improve its early diagnosis and management. Case Report: A 72-year-old woman presented with a painless, slowly enlarging subcutaneous mass for 2 years at the base of the right middle fingernail. She was treated surgically under digital block anesthesia and followed up for 12 months. Results: The patient recovered without complications, and follow-up visits showed no recurrence at 12 months post operative upon complete regrowth, clinical examination revealed well defined longitudinal groove. Conclusion: This case highlights the delayed presentation and the importance of complete excision of collagenous fibroma of the nail matrix, which can lead to a favorable prognosis when effectively managed.Subject AreasDermatology