The probability of implantation metastasis after peripheral lung cancer biopsy.

Background: At present, it is known that there is a possibility of pleural cavity and needle tract implantation metastasis after lung cancer puncture biopsy, but clinicians have not paid attention to this phenomenon, and the probability of occurrence is unknown. In this study, we aimed to study the probability of implantation metastasis after peripheral lung cancer biopsy.

Methods: The intraoperative isolated completely collapsed fresh intact human lung lobes of 30 patients with peripheral lung cancer were taken, and the tumor body was punctured. The pleural pinholes and puncture needle tips were repeatedly rinsed with normal saline respectively. The flushing solution was prepared as inoculum, and then the inoculum was smeared for microscopic examination to find cancer cells. The inoculum was inoculated subcutaneously into nude mice, and then the probability of pleural cavity and needle tract implantation metastasis after lung biopsy was indirectly obtained by obtaining the nude mice tumorigenesis rate.

Results: The tumorigenesis rate of nude mice in the pleural pinholes group was 3.3%, and the tumorigenesis rate of nude mice in the puncture needle tip group was 3.3%.

Conclusions: Patients with lung nodules suspected of being early stage cancer and who are fit for surgical resection may benefit from forgoing lung biopsies to avoid pleural cavity or needle tract seeding with tumor cells.