CT diagnostic and analysis of adenoid cystic cancinoma of the nasal cavity and paranasal sinus

Objective:To evaluate CT performance and clinical value in the diagnosis of adenoid cystic cancinoma (ACC) of the nasal cavity and paranasal sinus.Methods:Thirteen cases of ACC were analyzed retros pectively.Of all cases,8 cases with operation and 5 cases received radiotherapy.The manifestations of CT were evaluated and compared with the clinical and pathologic results.Results:Tumors originated fom maxillary sinus (8 cases),nasal cavity (4 case),ethmoid sinus (1 case).ACC invade adjacent organs or/and sctures,including ipsilateral ethmoid sinus,sphenoid sinus,nasal cavity,maxillary sinus,infratemporal fossa,roots of maxillary teeth,orbit and skull base et al.Altogether there were 1 case of stageⅡ,2 cases stage Ⅲ,and 10 cases Ⅳ.Adjacent bony remodeling (5 cases),erosive destruction (3 cases),both were shown in 5 cases.The morphology of ACC was irregular and the growth of the tumor was amorphous in 7 cases.Mottled pattern of lucencies within theyumor was shown in 84.6% of cases.Conclusion:Most of ACC of the nasal cavity and paranasal sinus are ethmoid clensity,infiltrated growth,growing along the never with infiltration,adjacent bony remodeling and reosive destruction.