Surg Cosmet Dermatol. 2009;1(3):120-124
Introduction: The lateral extent of the germinal matrix area of the nail is not demonstrated in the literature.
Objective: To identify the lateral limits of the ungueal matrix.
Material and methods: We evaluated the proliferation area of the lateral extent of the nail matrix on surgical samples resulting from the matricectomy for the treatment of ingrowing nail of the hallux with the Ki-67 immunohistochemical marker. We obtained 21 samples and observed the epidermis, ventral and dorsal region of the matrix, as well as ventral and dorsal matrix of the lateral/medial angle.
Results: The test of multiple comparisons demonstrated that the number of cells in the ventral matrix is higher than the number found in the skin, in the dorsal matrix, in the angle of the dorsal matrix and in the angle of the ventral matrix. The number of cells in the skin and in the angle of the ventral matrix is higher than the number found in the angle of the dorsal matrix.
Conclusion: The lateral limit of the ungueal matrix has proliferation activities. The surgery performed without the complete removal of the lateral/medial proliferation region of the nail matrix may infl uence the recurrence rate of matricectomies.
Keywords: HALLUX, NAILS, IMMUNOHISTOCHEMISTRY, AMBULATORY SURGICAL PROCEDURES
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