title: Breast metastasis from rhabdomyosarcoma of the anus in an adolescent female.
abstract: Rhabdomyosarcoma (RMS) of the breast is rare and there is scant information about the clinical behavior and treatment strategies. We report an adolescent female patient with metastatic RMS of the breast from the anus. An 18-year-old female patient was referred to our clinic due to palpable mass in the left breast. At age seven, she was diagnosed with acute lymphoblastic leukemia and treated with chemoradiation therapy. After 10 years of complete remission state, she presented with anal mass which was diagnosed as RMS and she received chemoradiation therapy. After 1 year of complete remission state, she noticed a palpable mass in her left breast. The breast mass was diagnosed as metastatic RMS based on core needle biopsy specimen. The RMS in breast was excised for the decreasing tumor burden despite of another metastatic lesion. Although rarely reported, metastasis of RMS should be considered as a cause of breast mass. Tissue biopsy is recommended when clinically suspected lesion is detected.
authors.affiliation: Division of Breast and Endocrine Surgery, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
authors.forename: Seung Pil
authors.initials: SP
authors.lastname: Jung
authors.forename: Yoon
authors.initials: Y
authors.lastname: Lee
authors.forename: Kang Min
authors.initials: KM
authors.lastname: Han
authors.forename: Se Kyung
authors.initials: SK
authors.lastname: Lee
authors.forename: Sangmin
authors.initials: S
authors.lastname: Kim
authors.forename: Soo Youn
authors.initials: SY
authors.lastname: Bae
authors.forename: Jiyoung
authors.initials: J
authors.lastname: Kim
authors.forename: Minkuk
authors.initials: M
authors.lastname: Kim
authors.forename: Sinill
authors.initials: S
authors.lastname: Kim
authors.forename: Won Ho
authors.initials: WH
authors.lastname: Kil
authors.forename: Hong Hoe
authors.initials: HH
authors.lastname: Koo
authors.forename: Seok Jin
authors.initials: SJ
authors.lastname: Nam
authors.forename: Jeoung Won
authors.initials: JW
authors.lastname: Bae
authors.forename: Jeong Eon
authors.initials: JE
authors.lastname: Lee
keywords: Adolescent; Anus; Breast; Neoplasm metastasis; Rhabdomyosarcoma