Primary Mucinous Cystadenocarcinoma of the Breast: Cytologic Finding and Expression of MUC5 Are Different from Mucinous Carcinoma
김성은, 박지혜, 홍순원, 구자승, 정준, 정우희,
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김성은 ( Kim Sung-Eun )
Yonsei University College of Medicine Department of Pathology
박지혜 ( Park Ji-Hye )
Yonsei University College of Medicine Department of Pathology
홍순원 ( Hong Soon-Won )
Yonsei University College of Medicine Department of Pathology
구자승 ( Koo Ja-Seung )
Yonsei University College of Medicine Department of Pathology
정준 ( Jeong Joon )
Yonsei University College of Medicine Department of Surgery
정우희 ( Jung Woo-Hee )
Yonsei University College of Medicine Department of Pathology
KMID : 0357920120460060611
Abstract
Mucinous cystadenocarcinoma (MCA) in the breast is a rare neoplasm. There have been 13 cases of primary breast MCA reported. The MCA presents as a large, partially cystic mass in postmenopausal woman with a good prognosis. The microscopic findings resemble those of ovarian, pancreatic, or appendiceal MCA. The aspiration findings showed mucin-containing cell clusters in the background of mucin and necrotic material. The cell clusters had intracytoplasmic mucin displacing atypical nuclei to the periphery. Histologically, the tumor revealed an abundant mucin pool with small floating clusters of mucin-containing tumor cells. There were also small cysts lined by a single layer of tall columnar mucinous cells, resembling those of the uterine endocervix. The cancer cells were positive for mucin (MUC) 5 and negative for MUC2 and MUC6. This mucin profile is different from ordinary mucinous carcinoma and may be a unique characteristic of breast MCA.
키워드
Mucinous cystadenocarcinoma; Breast; MUC5; MUC2
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