title: [A Case of Peritoneal Metastasis of Breast Cancer Diagnosed by Laparoscopic-Assisted Right Hemicolectomy].
abstract: The patient was an 86-year-old woman. She underwent right breast-conserving surgery and sentinel lymph node biopsy for breast cancer in August 2006. The pathological diagnosis was invasive ductal carcinoma, T1N0M0, Stage Ⅰ, ER (+), PgR (-), HER2 (-). She was treated with tamoxifen for 5 years as adjuvant therapy and showed no signs of recurrence. In November 2014, CA15-3 was elevated and an accumulation of FDG in the right paracolic sulcus was observed on PET-CT. Peritoneal metastasis of breast cancer was suspected, and an operation was performed for a definitive diagnosis. During the operation, the tumor was seen on the paracolic sulcus, and laparoscopic-assisted right hemicolectomy was performed. A poorly differentiated adenocarcinoma was diagnosed by pathological examination, and immunostaining results were as follows: CK7(+), CK20(-), mammaglobin (-), GCDFP-15 (-), ER (-), PgR (-), and HER2 (-). Because there was no original lesion other than the breast cancer, the tumor was diagnosed as a metastasis of breast cancer. The frequency of peritoneal metastasis of breast cancer is low. In this case, pathological diagnosis was necessary for a definitive diagnosis. A change of subtype was also confirmed, and the treatment strategy was decided appropriately. Surgical resection should be considered for peritoneal metastasis of breast cancer when the operation can be performed safely.
authors.affiliation: Dept. of Surgery, Kansai Rosai Hospital.
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Sato
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Okishiro
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ohneda
authors.forename: Yurina
authors.initials: Y
authors.lastname: Motoyama
authors.forename: Tomo
authors.initials: T
authors.lastname: Ishida
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Morimoto
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kusama
authors.forename: Katsunori
authors.initials: K
authors.lastname: Matsushita
authors.forename: Tadayoshi
authors.initials: T
authors.lastname: Hashimoto
authors.forename: Kei
authors.initials: K
authors.lastname: Kimura
authors.forename: Atsushi
authors.initials: A
authors.lastname: Naito
authors.forename: Kohei
authors.initials: K
authors.lastname: Murakami
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Katsura
authors.forename: Kanae
authors.initials: K
authors.lastname: Nitta
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Ohmura
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kagawa
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takeno
authors.forename: Hideki
authors.initials: H
authors.lastname: Sakisaka
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Taniguchi
authors.forename: Chiyomi
authors.initials: C
authors.lastname: Egawa
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Takeda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kato
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Tamura
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Takatsuka
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Goto
authors.forename: Teruaki
authors.initials: T
authors.lastname: Nagano
authors.forename: Shinichi
authors.initials: S
authors.lastname: Nakatsuka
mesh_terms: D000230:Adenocarcinoma / Q000601:surgery*; D000369:Aged, 80 and over; D018931:Antineoplastic Agents, Hormonal / Q000627:therapeutic use; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001943:Breast Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery*; D044584:Carcinoma, Ductal / Q000188:drug therapy / Q000601:surgery*; D003082:Colectomy; D005260:Female; D006801:Humans; D010535:Laparoscopy; D010534:Peritoneal Neoplasms / Q000556:secondary* / Q000601:surgery*; D012008:Recurrence; D013629:Tamoxifen / Q000627:therapeutic use; D005641:Tegafur / Q000627:therapeutic use; D014498:Uracil / Q000627:therapeutic use
chemical_list: D018931:Antineoplastic Agents, Hormonal; D013629:Tamoxifen; D005641:Tegafur; D014498:Uracil