title: A case of solitary breast metastasis from malignant melanoma of the nasal cavity.
abstract: Metastatic breast tumors are rare; however, malignant melanoma is one of the primary tumors most commonly reported to metastasize to the breast. Among these, the primary tumors typically associated with metastasis to the breast are cutaneous melanomas. We present, herein, a very rare case of solitary metastasis to the left breast from malignant melanoma of the nasal cavity, which represents less than 1% of all malignant melanomas. The patient, a 78-year-old woman, was treated using a combination of surgery and radiotherapy. In the absence of therapeutic efficacy, disease progression was very rapid. No previous studies have described malignant melanoma of the nasal cavity with solitary breast metastasis. This case report aims to increase awareness of the need to establish treatment strategies based on an understanding of the etiology and pathophysiology.
authors.affiliation: Section of Breast and Endocrine Surgery, Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Osaka 569-8686,  Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Tanaka
authors.forename: Nayuko
authors.initials: N
authors.lastname: Sato
authors.forename: Hiroya
authors.initials: H
authors.lastname: Fujioka
authors.forename: Yuko
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Kosei
authors.initials: K
authors.lastname: Kimura
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Iwamoto
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Uchiyama