Primary mucinous cystadenocarcinoma of the breast: A case report and literature review.

ABSTRACT: Mucinous cystadenocarcinoma (MCA) is a rare breast cancer. The present study reports a case of primary MCA of the breast with a comprehensive evaluation of this rare tumour. A 51-year-old woman sought medical attention for a mass in the left breast. A core needle biopsy revealed an infiltrating adenocarcinoma with mucus secretion and papillary formation. The macroscopic appearance was of a greyish-white, tough and well-circumscribed solid mass, without a notable cyst. Microscopically, the tumour consisted of ducts and cysts of varying sizes. Varying degrees of branching papillary structures were observed in the lumen and cyst cavities. The tumour cells were highly columnar in shape, with high-grade nuclei arranged in a single-layer. Immunohistochemistry revealed that the tumour was a basal

SUBMITTER: Cao X 

PROVIDER: S-EPMC11602826 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature