Malignant Melanocytic Matricoma and Criteria for Malignancy

作     者：Colton B. Nielson Vladimir Vincek 

作者机构：Department of Dermatology University of Florida College of Medicine Gainesville USA 

出 版 物：《Open Journal of Pathology》 (病理学期刊（英文）)

年 卷 期：2018年第8卷第3期

页      面：94-100页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Pigmented Malignant Pilomatricoma Malignant Melanocytic Matricoma Melanocytic Matrical Carcinoma Matricoma 

摘      要：Melanocytic matricoma is a very rare adnexal tumor that recapitulates the anagen hair follicle bulb. Few cases of malignant melanocytic matricoma have been reported, thus criteria for malignant potential have not been previously reviewed. We report a case of an 81 year old male that was originally diagnosed as atypical melanocytic matricoma. The site was re-excised with a small focus of residual tumor, but all margins were negative. The re-excision site healed without complication. However, two years after the original biopsy, a new 8 mm firm nodule appeared at the re-excision site, which was subsequently diagnosed as malignant melanocytic matricoma (MMM). In the following paper we will report a new case of MMM and review potential criteria that could be used in the future to establish malignant potential.