Malignant adnexal tumor of the skin on breast: A case report of apocrine carcinoma

INTRODUCTION: Malignant adnexal tumors of the skin (MATS) are a group of rare and varied tumors that lack standardized guidelines for their management. Apocrine carcinoma (AC) is a highly uncommon form of breast malignancy, contributing to less than 1 % of all female invasive breast carcinomas. AC has a similar microscopic growth pattern to invasive ductal carcinoma, which can result in early misdiagnosis. PRESENTATION OF CASE: This report presents a case of a 67-year-old female with a lump in the superior lateral quadrant of her left breast for six years. Surgical therapy was performed with wide excision due to clinical operability, no significant involvement of the axillary lymph nodes, and without metatasis. During the operation, Wide excision of 1–2 cm free margin according to standard and local reconstruction flaps were performed, with berry packing for the identified lymph nodes. DISCUSSION: The tumor was ER and PR negative, so hormonal treatment would be ineffective, assuming that this is an apocrine carcinoma of the breast. A metastatic work up was already done, and no metastasis was found. A mastectomy would appear to be a viable option. CONCLUSION: It is important to perform a clinical reevaluation to provide optimal treatment for breast malignancy. Misdiagnosis can occur early. In this case, a surgical procedure involving wide excision was performed, and as of now, the patient has not reported any recurrence.