CT, MRI, and FDG PET/CT Findings of Sinonasal Sarcoma: Differentiation from Squamous Cell Carcinoma
Jin Ho Kim,
Dae Young Yoon,
Sora Baek,
Min Woo Park,
Kee Hwan Kwon,
Young Soo Rho
Affiliations
Jin Ho Kim
Department of Radiology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Dae Young Yoon
Department of Radiology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Sora Baek
Department of Nuclear Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Min Woo Park
Department of Otorhinolaryngology-Head and Neck Surgery, Ilsong Memorial Institute of Head and Neck Cancer, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Kee Hwan Kwon
Department of Otorhinolaryngology-Head and Neck Surgery, Ilsong Memorial Institute of Head and Neck Cancer, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Young Soo Rho
Department of Otorhinolaryngology-Head and Neck Surgery, Ilsong Memorial Institute of Head and Neck Cancer, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
Purpose To evaluate computed tomography (CT), magnetic resonance imaging (MRI), and 18F-fluorodeoxyglucose (FDG) positron emission tomography/CT (PET/CT) findings for the differentiation of sinonasal sarcoma from squamous cell carcinoma (SCC). Materials and Methods We retrospectively reviewed CT, MRI, and FDG PET/CT results in 20 patients with pathologically proven sinonasal sarcoma (n = 7) and SCC (n = 13). Imaging characteristics of tumors, such as the shape, size, margin, MRI signal intensity, pattern of enhancement, local tumor invasion, and maximum standardized uptake value (SUVmax) were analyzed and compared between sarcoma and SCC. Results The SUVmax of sarcomas (7.4 ± 2.1) was significantly lower than the SUVmax of the SCCs (14.3 ± 4.5) (p = 0.0013). However, no significant difference in the shape, size, margin, MRI signal intensity, pattern of enhancement, and local tumor invasion was observed between sarcoma and SCC. Conclusion Although CT and MR imaging features are nonspecific, FDG PET/CT is useful in distinguishing between sinonasal sarcoma and SCC based on the SUVmax value.
