RESUMO
Objective To investigate the imaging features of peripheral schwannoma and analyze the relevant pathological basis to improve the preoperative diagnosis.Methods Fifty-one cases with schwannoma confirmed by pathological were analyzed retrospectively,and the CT and MRI findings were studied in correlation with pathological results.Results There were 24 cases in the neck,11 in the chest wall and 16 in the abdominal and pelvis.On the CT plain scan,12 cases showed slightly low and equal density,21 cases showed iso-density,5 cases showed low density.Most of the lesions showed mild to moderate homogenous enhancement and some lesions showed significantly heterogeneous enhancement on contrast-enhanced CT.On T1 WI,4 cases showed hypointense and isointense signal,and 1 case showed mixed signal.All cases showed hyperintense signal or mixed signal on T2 WI and heterogeneous marked enhancement on contrast-enhanced MRI.Conclusion Schwannomas in neck,chest wall,abdominal and pelvic have similar findings on CT and MRI. However,there are characteristic signs in different part.CT and MRI can accurately show the tumor shape,location,internal structure and relationship with adjacent structures,which has important value to diagnosis and differential diagnosis of peripheral schwannoma.