Intrapulmonary recurrence after computed tomography-guided percutaneous needle biopsy of stage I lung cancer.

Tumor seeding, along the needle tract after percutaneous needle biopsy, is a rare condition and most of the reported cases are implantation metastasis, which occurred in the chest wall or the pleura. We present a case of implantation metastasis that occurred in the pulmonary parenchyma, after a computed tomography-guided percutaneous needle biopsy (CT-PNB) of stage I lung cancer.