Myoid hamartoma of the breast that proved difficult to diagnose: a case report

• Published in: World journal of surgical oncology Vol. 10; no. 1; p. 12
• Main Authors: Mizuta, Naruhiko, Sakaguchi, Koichi, Mizuta, Mitsuhiko, Imai, Aya, Nakatsukasa, Katsuhiko, Morita, Midori, Soshi, Mari, Goto, Mariko, Yasukawa, Satoru, Konishi, Eiichi, Taguchi, Tetsuya
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 16.01.2012; BioMed Central; BMC
• Subjects: Adult; Breast Neoplasms - diagnosis; breast tumor; Care and treatment; Case Report; Case studies; Diagnosis; Diagnosis, Differential; Female; Fibroadenoma - diagnosis; Hamartoma; Hamartoma - diagnosis; Health aspects; Humans; Magnetic Resonance Imaging; Mammography; myoid hamartoma; smooth-muscle actin; Ultrasonography, Mammary; Women; Japan
• ISSN: 1477-7819; 1477-7819
• DOI: 10.1186/1477-7819-10-12

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.