CEACAM5 and neoplasm: On the other hand, not all NSCLCs presenting as a solid nodule are highly invasive or easily metastasized, and the most appropriate indications for segmentectomy with a curative intent is a combination of tumor diameter, large CTR values, SUVmax, carcinoembryonic antigen (CEA) level, etc. These results will be validated by large-scale, prospective, randomized trials.