title: Case report of pseudoaneurysm caused by core needle biopsy of the breast.
abstract: We treated a patient with a pseudoaneurysm caused by core needle biopsy (CNB), in which both the cancer and the aneurysm were excised by breast conservation therapy. A 51-year-old woman attended a local hospital because of a 25-mm mass in the upper outer quadrant of the right breast. CNB was performed, and brisk bleeding occurred at the biopsy site. Immediate hemostasis was achieved with direct manual compression. CNB detected fatty tissue, and a diagnosis could not be made. When she presented at our hospital 6 weeks later, there was a 25-mm pulsating mass at the biopsy site. Color-flow Doppler US and dynamic MRI showed a breast tumor and pseudoaneurysm formation. For the purpose of diagnosis and treatment of the breast tumor and pseudoaneurysm, lumpectomy of the right breast was performed. Histological diagnosis was papillotubular carcinoma and pseudoaneurysm. Although this condition is relatively rare, it is important to be aware of the possibility of complications, such as pseudoaneurysms, which require treatment.
authors.affiliation: Clinical Research Institute, National Hospital Organization, Kyushu Medical Center, Jigyohama, Chuo-ku, Fukuoka, Japan.
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Sasada
authors.forename: Roka
authors.initials: R
authors.lastname: Namoto-Matsubayashi
authors.forename: Goro
authors.initials: G
authors.lastname: Yokoyama
authors.forename: Hiroki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Sakai
authors.forename: Kenta
authors.initials: K
authors.lastname: Koike
authors.forename: Seiya
authors.initials: S
authors.lastname: Momosaki
authors.forename: Noriko
authors.initials: N
authors.lastname: Uesugi
authors.forename: Teruhiko
authors.initials: T
authors.lastname: Fujii
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D017541:Aneurysm, False / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D001707:Biopsy, Needle / Q000009:adverse effects*; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery; D002291:Carcinoma, Papillary / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D018615:Ultrasonography, Doppler, Color