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Melanonychia - Clues for a Correct Diagnosis
Teodora C Gradinaru1, Mara Mihai2, Cristina Beiu2
1Dermatology, Elias Emergency University Hospital, Bucharest, ROU.
Melanonychia, a nail discoloration, arises from melanocytic activation or hyperplasia. Distinguishing benign from malignant causes is crucial for proper patient management and diagnosing subungual melanoma.
Area of Science:
- Dermatology
- Oncology
Background:
- Melanonychia presents as brown to black nail plate discoloration.
- Causes can be benign or malignant.
- Two primary mechanisms: melanocytic activation and melanocytic hyperplasia.
Purpose of the Study:
- To review the main causes of melanonychia.
- To emphasize diagnostic clues for subungual melanoma.
Main Methods:
- Review of medical literature.
- Analysis of clinical presentation.
- Dermoscopic examination.
- Histopathological findings.
Main Results:
- Melanocytic activation and hyperplasia are key mechanisms.
- Clinical history, dermoscopy, and histopathology aid differentiation.
- Essential for accurate patient management.
Conclusions:
- Distinguishing benign vs. malignant melanonychia is critical.
- Early diagnosis of subungual melanoma is vital.
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