Objective To analyses the misdiagnostic reasons of inverted papilloma of the nose and paranasal sinuses by CT.Methods 10 patients with inverted papilloma of the nose and paranasal sinuse,to be misdiagnosed by CT before surgery were analysed.Results The CT findings of inverted papilloma of the nose and paranasal sinuses were the crawling growths of soft-tissue mass in the one side of the nose and paranasal,there were slight to moderate enhancement and probably with destruction of bone and osteosclerosis.Conclusion The rate of CT misdiagnosis of inverted papilloma in nose and paranasal sinuse can be reduced if we are strictly followed the operational rules and to do CT contrast enhance scan.

Objective To explore the CT manifestations and study the value in diagnosing type Ⅲb aortic dissection.Methods CT scanning was performed in 16 cases with type-Ⅲb aortic dissection.The imaging findings were analyzed retrospectively.Results All the cases survived beyond 5 years,12 cases were showed crescent-shaped valve,the false lumen in left was obtained in 15 cases,thrombosis in 9 cases were demonstrated in false lumen and 6 cases showed leakage complications.Conclusion The rate of five years survival is high in cases with type-Ⅲb aortic dissection.CT feature of type-Ⅲb aortic dissection is the crescent-shaped valve with the false lumen in the left.

BACKGROUNDCisplatin-based chemotherapy is the standard regimens in the treatment of advanced non-small cell lung cancer (NSCLC). The aim of this trial is to evaluate the efficacy and toxicity of paclitaxel or gemcitabine combined with cispltin for patients with advanced NSCLC.

METHODSSeventy-seven advanced NSCLC patients were randomly divided into 2 groups, 39 in TP group and 38 in GP group. TP group: paclitaxel 135 mg/m², on day 1; cisplatin 30 mg/m², on days 1-3. GP group: gemcitabine 1000 mg/m², on days 1, 8; cisplatin 30 mg/m², on days 1-3.

RESULTSPatients' characteristics were similar between the two groups. The overall response rate was 46.2% in the TP group and 42.1% in the GP group. There was no statistically significant difference in response rate between the two groups (P > 0.05). The major cytotoxicity was leukopenia in the TP group and thrombocytopenia in the GP group.

CONCLUSIONSBoth TP and GP regimens are effective for advanced NSCLC and have no significant difference. The side effects of the two regimens are different but all adverse reactions are tolerable.