MUCINOUS CYSTADENOCARCINOMA OF THE BREAST: A CASE REPORT AND REVIEW OF THE LITERATURE
Fatima-Zahra Kahouadji*, Dauphin Ntama, Soukaina Harrak, Saber Boutayeb, Ibrahim El Ghissassi, H. M’rabti and H. Errihani
ABSTRACT
Mucinous cystadenocarcinoma (MCA) is an unusual variant of primary breast carcinoma that bears a striking resemblance to MCAs of the ovary, pancreas and appendix. The metastatic lesion must be ruled out before the diagnosis can be determined. The differential diagnosis of MCA includes metastasis from other organs and cystic hypersecretory breast carcinoma. The incidence of breast mucinous cystadenocarcinoma is about 1-6% of primary breast cancers. It is usually diagnosed in postmenopausal women. The entity is usually triple-negative breast cancer. Herein we describe a case of 50-year-old female patient diagnosed histological with mucinous cystadenocarcinoma of the left breast. Immunohistochemistry profile showed triple negative and a high proliferation index. The biological behavior of MCA of the breast is reportedly favorable despite having a high proliferation index and triple-negative biomarker status. The importance of chemotherapy and radiotherapy is still debatable given the positive overall prognosis. The purpose of this study is to add to the body of literature by describing another instance of this uncommon case.
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