Diagnostic value of ~(18)F-FDG PET/CT on primary bronchial-pulmonary carcinoid / 重庆医科大学学报

ABSTRACT

Objective:approach to the diagnostic value of 18F-FDG PET/CT on primary bronchial-pulmonary carcinoid.Methods:7 cases of peripheral bronchial-pulmonary carcinoid checked with CT and 18F-FDG PET/CT were analyzed retrospectively,the image characteristics,PET/CT standard uptake values were measured and compared with pathology results.Results:carcinoid were found 1 on apex and frontal of the upper right lung each,1 on middle lobe,2 on lower right lung,and 1 on apicoposterior segment of the upper left lung and posterior of lower segment each.The diameter were 3.4￣ 6.2 cm,average 5.4 cm.CT shows the lesions were round or irregular nodus with clear edge and even density similar to soft tissue,2 among which were slightly lobulated,1 with spicular sign and 1 with patching shade around.18F-FDG in all 7 cases were slight or significantly increased,SUV valued 3.3?1.4(2.8￣5.3),2 cases showed uneven distribution with irregular patching and linear defect.FDG uptake in mediastinal and celiac lymph nodes were increased in 1 case.All cases were later proven to be atypical neuroendocrine carcoma carcinoid by surgical pathology and 1 case with mediastinal lymph nodes metastasis Conclusion:bronchial-pulmonary carcinoid can clearly be shown by abnormal FDG concentration on PET image,and its malignancy can be judged base on concentration and structural changes,meanwhile,CT can precisely locate the lesion and provide detailed data of its relationship with surrounding tissue.