关键词: 磁共振成像, 横纹肌肉瘤, 颌面部, 儿童

Abstract: ［Abstract］ Objective To investigate the MRI findings and characteristics of rhabdomyosarcoma of the maxillofacial region in children. Methods MRI findings and characteristics of 10 children with maxillofacial rhabdomyosarcoma confirmed by surgery and pathology in our hospital were retrospectively analyzed， and the literature was reviewed. Results Among the 10 cases of pediatric maxillofacial rhabdomyosarcoma， seven cases occurred in the temporal region， one in maxilla， one in mandible and one in pharynx. The neoplasm is irregular in shape， poorly defined， MRI showed isointensityor hyperintensity on T1WI， slightly hyperintensity on T2WI， and restricted diffusion on DWI. Uneven enhancement was seenpost contrast. The tumors tend to infiltrate surrounding tissues. The parotid gland was involved in 4 cases， ear canal in six cases， pharynx in three cases， adjacent muscles in five cases， bone destruction in six cases， internal carotid artery was pushed and compressed in three cases， and two cases reached up to the skull base. Conclusion Rhabdomyosarcoma of the maxillofacial region in children tends to occur in the temporal region and infiltrate surrounding tissues， invades adjacent muscles and lead to bone destruction. MRI can clearly show the tumor and its boundary， surrounding soft tissue infiltration range and bone destruction， providing comprehensive imaging diagnostic information。

Key words: rhabdomyosarcoma, maxillofacial region, magnetic resonance imaging, children