Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2017
Frequency of Subungual Melanoma in Longitudinal Melanonychia: A Single-Center Experience.
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Decker Ashley, Connolly Karen L, Lee Erica H, Busam Klaus J, Nehal Kishwer S
Аннотация
BACKGROUND: Clinical and dermatoscopic guidelines are used to differentiate between benign longitudinal melanonychia (LM) and subungual melanoma; however, the frequency of malignancy among patients undergoing a biopsy for LM is not well defined.
OBJECTIVE: To describe the histologic diagnoses and malignancy among patients undergoing a biopsy for clinical LM.
METHODS: Retrospective cohort study of consecutive patients who underwent a nail biopsy for LM at a single cancer center between 2000 and 2014. Clinical features, biopsy techniques, and histopathologic results were reviewed.
RESULTS: Forty-two patients with 43 biopsied lesions were included. Three of the 43 biopsies revealed melanoma (mean depth 2.1 mm). The mean age among patients with malignant lesions was 60 years compared with 58.1 years for benign lesions. The mean width of all biopsied lesions was 4.2 mm, with a mean of 10.7 mm for malignant and 3.4 mm for benign. The first digit was the most commonly involved nail in both malignant and benign lesions.
CONCLUSION: Most nail biopsies performed for LM revealed benign pathology; however, melanoma was diagnosed in a small subgroup. Although clinical and dermatoscopic guidelines help guide biopsies, they should not replace clinical judgment as malignant lesions can deviate from these guidelines.
OBJECTIVE: To describe the histologic diagnoses and malignancy among patients undergoing a biopsy for clinical LM.
METHODS: Retrospective cohort study of consecutive patients who underwent a nail biopsy for LM at a single cancer center between 2000 and 2014. Clinical features, biopsy techniques, and histopathologic results were reviewed.
RESULTS: Forty-two patients with 43 biopsied lesions were included. Three of the 43 biopsies revealed melanoma (mean depth 2.1 mm). The mean age among patients with malignant lesions was 60 years compared with 58.1 years for benign lesions. The mean width of all biopsied lesions was 4.2 mm, with a mean of 10.7 mm for malignant and 3.4 mm for benign. The first digit was the most commonly involved nail in both malignant and benign lesions.
CONCLUSION: Most nail biopsies performed for LM revealed benign pathology; however, melanoma was diagnosed in a small subgroup. Although clinical and dermatoscopic guidelines help guide biopsies, they should not replace clinical judgment as malignant lesions can deviate from these guidelines.