Application value of CT target reconstruction technique in the diagnosis of visceral pleural invasion of lung adenocarcinoma

ObjectiveTo analyze the relationship between the image features of lung adenocarcinoma and visceral pleural invasion(VPI) using CT target reconstruction.

MethodsThe data of 162 lung adenocarcinoma patients with the maximum diameter less than or equal to 3 cm diagnosed by postoperative pathology were retrospectively analyzed.The PL1 and PL2 were classified as the positive VPI group, and the PL0 was classified as the negative VPI group according to the classification of pleural invasion degree of the new TNM international classification of lung cancer.The relationship between lung adenocarcinoma and adjacent visceral pleura was analyzed under CT target reconstruction.

ResultsThe relationship between nodules and visceral pleura could be divided into the following five types: the nodules had nothing to do with pleura in 41 cases; there was one or more linear shadows between the nodules and pleura complicated without signs of depression in pleura in 26 cases; there was one or more linear shadows between the nodules and pleura complicated with signs of depression in pleura in 37 cases; the nodules were pasted to pleura with ground glass density in 8 cases; and the nodules were pasted to pleura with solid density in 50 cases.The differences of the age, gender and maximum nodule diameter between VPI positive group and VPI negative group were not statistically significant(P>0.05), and the minimum distance from the lesion to the pleura in VPI positive group was greater than that in VPI negative group(P < 0.01).The difference of the classification of the relationship between nodules and pleura between the VPI positive group and VPI negative group was statistically significant(P < 0.01).

ConclusionsThe VPI is more likely to occur in lung adenocarcinoma with pleural depression and solid pleural veneer.