title: [Serous Carcinoma of the Peritoneum with Metastases to the Breast and Axillary Lymph Nodes].
abstract: Metastasis of peritoneal serous carcinoma to the breast and axillary lymph nodes is rare. We present a case of serous carcinoma of the peritoneum with metastases to the breast and axillary lymph nodes. A 72-year-old woman was diagnosed with Stage III peritoneal serous carcinoma in November 2009; she was treated with 6 courses of paclitaxel and carboplatin. In December 2015, she had a palpable mass(2×2 cm)and enlarged axillary lymph nodes. Mammography did not reveal any mass(C1)and ultrasonographic examination demonstrated a partially ill-defined hypoechoic mass with a diameter of 8.7× 7.1 mm. Cytological examination of the axillary lymph node revealed malignancy; breast carcinoma metastasis was suspected and the patient underwent breast-conserving surgery. Histopathological examination of the specimens(breast and axillary lymph nodes)revealed adenocarcinoma, and immunohistochemistry analysis showed that the specimens were CK7(+), CK20(-), CA125(+), PAX8(+), and GCDFP15(-). Taken together, the results indicated peritoneal serous carcinoma metastases to the breast and axillary lymph nodes.
  
  
  CONCLUSIONS
  We report a case of serous carcinoma of the peritoneum with metastases to the breast and axillary lymph nodes.
authors.affiliation: Dept. of Surgery, Kansai Medical University.
authors.forename: Aiko
authors.initials: A
authors.lastname: Ueda
authors.forename: Daigo
authors.initials: D
authors.lastname: Yamamoto
authors.forename: Yu
authors.initials: Y
authors.lastname: Tsubota
authors.forename: Noriko
authors.initials: N
authors.lastname: Sueoka
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Yoshikawa
authors.forename: Masanori
authors.initials: M
authors.lastname: Kon
mesh_terms: D000368:Aged; D001365:Axilla; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology* / Q000601:surgery; D008207:Lymphatic Metastasis; D010534:Peritoneal Neoplasms / Q000556:secondary* / Q000601:surgery