title: Myoid hamartoma of the breast that proved difficult to diagnose: a case report.
abstract: Myoid hamartomas of the breast are extremely rare breast lesions, with a poorly understood pathogenesis. We describe the case of a 38-year-old premenopausal woman who presenting with a mass in the left breast. Mammography revealed an oval mass that was partly indistinct, and ultrasonography showed a hypoechoic mass with a slightly irregular margin. Bilateral breast dynamic magnetic resonance imaging was performed for a more detailed evaluation. The images showed rapid initial enhancement and a microlobulated margin. Because the suspicion of malignancy was strong at that time, core needle biopsy was performed. Histologically, the tumor was identified as fibroadenoma. A case of myoid hamartoma of the breast that proved difficult to diagnose is reported, and discussed with reference to the literature.
authors.affiliation: Department of Endocrine and Breast Surgery, Kyoto Prefectural University of Medicine, Kawaramachi, Hirokoji, Kamikyo-ku, Kyoto, Japan. nmizuta@koto.kpu-m.ac.jp
authors.forename: Naruhiko
authors.initials: N
authors.lastname: Mizuta
authors.forename: Koichi
authors.initials: K
authors.lastname: Sakaguchi
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Mizuta
authors.forename: Aya
authors.initials: A
authors.lastname: Imai
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Nakatsukasa
authors.forename: Midori
authors.initials: M
authors.lastname: Morita
authors.forename: Mari
authors.initials: M
authors.lastname: Soshi
authors.forename: Mariko
authors.initials: M
authors.lastname: Goto
authors.forename: Satoru
authors.initials: S
authors.lastname: Yasukawa
authors.forename: Eiichi
authors.initials: E
authors.lastname: Konishi
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Taguchi
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D018226:Fibroadenoma / Q000175:diagnosis*; D006222:Hamartoma / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008327:Mammography; D016217:Ultrasonography, Mammary