A Case of Granular Cell Tumor of the Breast in a Male Patient

• Published in: Journal of the Korean Society of Radiology Vol. 79; no. 5; pp. 259 - 263
• Main Authors: Lee, Gyoung-Eun, Kim, Ji-Young, Kim, Jae Hyung, Jeong, Myeong Ja, Kim, Soung Hee, Kim, Soo Hyun, Kang, Mi-Jin, Lee, Ji Hae, Bae, Kyung-Eun, Kim, Tae Gyu
• Format: Journal Article
• Language: English
• Published: The Korean Society of Radiology 01.11.2018; 대한영상의학회
• Subjects: breast ultrasonography; granular cell tumor; male breast tumor; s-100 protein; 방사선과학
• ISSN: 1738-2637; 2288-2928; 2951-0805
• DOI: 10.3348/jksr.2018.79.5.259

A 52-year-old male complained of a painless, firm, and slow-growing mass in his right breast outer portion. The chest CT revealed a 3.3 cm-sized oval shaped, microlobulated, mild enhancing mass. Ultrasound showed a microlobulated marginated heterogeneous hypoechoic mass with internal vascularity and calcifications in the mass. On the ultrasound-guided core needle biopsy, the mass was confirmed as a benign granular cell tumor (GCT). The patient transferred to another hospital and underwent surgical removal of the lesion. GCT of the breast is uncommon and mostly benign neoplasm to originate from Schwann cell. Clinical and radiologic features of GCTs, including CT and ultrasound images, mimic malignancy and make diagnosis of GCT more difficult. The CT images of GCTs are much rarely reported. Physicians and radiologists must be aware of radiologic characteristics of this rare benign tumor for male breast, to avoid misdiagnosis this tumor for breast malignancy and overtreat.