title: Sonographic findings in masseter-muscle metastases.
abstract: Symptomatic metastases in skeletal muscles are rare, and involvement of the masseter muscle is extremely rare, with only 3 reported cases. We report 2 additional cases of masseter-muscle metastases. Sonographically, the masseter-muscle metastases appeared as ill-defined, hypoechoic, heterogeneous lesions aligned with the long axis of the muscle. Fine-needle aspiration was confirmatory. The combination of sonography and fine-needle aspiration is the ideal method for diagnosing masseteric metastases.
authors.affiliation: Department of Diagnostic Radiology and Organ Imaging, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
authors.forename: A T
authors.initials: AT
authors.lastname: Ahuja
authors.forename: A D
authors.initials: AD
authors.lastname: King
authors.forename: M J
authors.initials: MJ
authors.lastname: Bradley
authors.forename: W W
authors.initials: WW
authors.lastname: Yeo
authors.forename: T S
authors.initials: TS
authors.lastname: Mok
authors.forename: C
authors.initials: C
authors.lastname: Metreweli
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000556:secondary; D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000000981:diagnostic imaging* / Q000473:pathology; D019042:Muscle Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D009382:Neoplasms, Unknown Primary / Q000000981:diagnostic imaging* / Q000473:pathology; D014463:Ultrasonography