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KMID : 1103720120660020123
Journal of the Korean Society of Radiology
2012 Volume.66 No. 2 p.123 ~ p.127
Initial Presentation of Renal Cell Carcinoma as a Metastatic Mass within the Masseter Muscle: A Case Report and Literature Review
Bae Kyung-Eun

Lee Han-Bee
Cho Woo-Ho
Kim Jae-Hyung
Lee Ji-Hae
Kang Mi-Jin
Kim Hyun-Jung
Abstract
Renal cell carcinoma (RCC) is often concomitant with distant metastasis, and these metastases are the first sign of an otherwise occult primary. Whereas metastasis of RCC to the head and neck has been reported, metastasis to the masseter muscle, which is composed of skeletal muscle, is quite rare. We now report the case of a 66-year-old man who had a past history of pulmonary tuberculosis, with RCC metastasis of a well-defined intensely enhancing hypervascular mass in the masseter muscle as the initial presentation. We present the imaging findings of this case and a literature review about radiologic differential diagnosis of intramasseteric masses.
KEYWORD
Metastatic Renal Cell Carcinoma, Masseter Muscle, Masticator Space
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