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Nam, Han, Lee, and Lee: MR Findings of Hamartoma of the Breast: A Report of Two Cases
Case Report
Journal of the Korean Society of Magnetic Resonance in Medicine

Journal of the Korean Society of Magnetic Resonance in Medicine 2012; 16(3): 271-275.

Published online: 31 December 2012

DOI: https://doi.org/10.0000/jksmrm.2012.16.3.271

MR Findings of Hamartoma of the Breast: A Report of Two Cases

Sang Yu Nam, Boo-Kyung Han, Sunjung Lee, Kwanghwi Lee

Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.

Corresponding author: Boo-Kyung Han, M.D., Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea. Tel. 82-2-3410-0517, Fax. 82-2-3410-6368, bkhan@skku.edu

Received 1 November 2012       Revised 18 December 2012       Accepted 26 December 2012

Copyright © 2012 Korean Society of Magnetic Resonance in Medicine

Abstract

Breast hamartoma is a relatively rare pathology, composed of various amount of mammary glandular, fatty and fibrous tissue. Here, we report MR findings of two cases of hamartomas; one of them was incidentally found in her left breast during preoperative MRI in a woman with right breast cancer, and the other was presented as a large palpable mass. Both of them were confirmed by surgical excision. Breast hamartoma shows a well-defined mass with mixed signal intensity on T2-weighted image MRI and a little or focal enhancement on contrast-enhanced MRI.

Keywords: Breast neoplasms, Hamartoma, Magnetic resonance imaging (MRI)

Figures and Tables

Fig. 1
A 44-year-old woman with hamartoma of the left breast.
a. Axial T1-weighted spin echo MRI (TR/TE, 400/7) shows a 2 cm, oval shaped, circumscribed mass with central high signal intensity and peripheral iso signal intensity in left upper inner quadrant (arrow). b. Axial fat - suppressed fast spin echo T2-weighted MRI (TR/TE, 5000/70) shows a mass with central iso signal intensity, which was regarded as fat component and peripheral high signal intensity (arrow). c. Sagittal dynamic contrast-enhanced fat-suppressed T1-weighted image MRI shows mild peripheral nodular enhancement of the mass (arrows). d. The time-intensity curve obtained from the site of nodular enhancement during dynamic contrast enhanced MRI shows the presence of a gradual enhancement pattern. e. Second-look ultrasonogrpahy shows an oval shaped, circumscribed, hyperechoic mass in the left upper inner quadrant (arrows). f. Mediolateral mammogram shows a 2 cm, oval shaped, well-defined mass with internal fat density (arrows).
jksmrm-16-271-g001
Fig. 2
A 48-year-old woman with hamartoma of the right breast.
a, b. Craniocaudal and mediolateral mammograms of her right breast show a 7cm sized, oval shaped, circumscribed, isodense mass at palpable site of the right breast (arrows). c. Ultrasonography shows an oval shaped, circumscribed, heterogeneous and isoechoic mass (arrows). d. Axial T1-weighted spin echo MRI (TR/TE, 660/8) shows an oval shape, circumscribed mass with iso signal intensity (arrows). e. Axial fat - suppressed fast spin echo T2-weighted MRI (TR/TE, 5,500/70) shows a mass with mixed signal intensity (arrows). F. Sagittal dynamic contrast-enhanced fat-suppressed T1-weighted image MRI shows no enhancement except a little peripheral enhancement (arrow). g. Photomicrograph shows several small clusters of adipocytes within a densely fibrotic stroma (adipocyte (black arrows), glandular tissue (white arrows), fibrous tissue (black arrowheads), haematoxylin and eosin stained; original magnification, ×100).
jksmrm-16-271-g002

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