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Objective To investigate the relationship between CT characteristics and histological differentiation of soft tissue sar-comas.Methods Forty-two cases with pathologically proved soft tissue sarcomas were collected.The tumor size,morphology,den-sity and relationship of the tumor to the adjacent structures on CT were analyzed retrospectively.The value of the CT signs in evalu-ating the histological differentiation of the tumor was explored.Results The maximal diameter of the tumor was over 5 cm in 36 ca-ses.Oval shape was seen in 29 cases and irregular shape was seen in 13 cases.Heterogeneous density was seen in 32 cases including intratumoral calcification in 3 cases and intratumoral necrosis in 22 cases.Adjacent structures were infiltrated in 25 cases.Compared to the pathological results,intratumoral necrosis and invasion of adjacent structures were related to the degree of histological differ-entiation (P <0.05),and the relation coefficients were 0.64 and 0.57,respectively (P <0.01).Conclusion Intratumoral necrosis and invasion of adjacent structures are correlated with the histological differentiation of the soft tissue sarcomas.They may reflect the biological behavior of low-differentiated or undifferentiated soft tissue sarcomas to some extent.
ABSTRACT
Objective To evaluate the CT manifestations of intrathoracic metastasis in nasopharyngeal carcinoma and its rule.Methods CT manifestations of intrathoracic metastasis of nasopharyngeal carcinoma in 35 cases confirmed by pathology were analysed.Results The CT findings were:nodular type(27/35),pulmonary hilar type(5/35),peripheral massive type(3/35).Of them,60% patients had metastasis of mediastinum.Conclusion CT is a very useful method in diagnosis of intrathoracic metastasis of nasopharygeal carcinoma.