Tumor marker testing is an option at 6 mm for lung nodules, but it is not the primary basis for a definitive diagnosis.
Tumor markers are a class of substances that appear along with tumors and are usually in elevated levels, which can be synthesized and released by the tumor cells themselves, or produced by the body after reacting to the tumor cells.
The role of tumor marker test mainly includes tumor census and screening, tumor diagnosis and differential diagnosis, efficacy monitoring and prognosis judgment after surgery, radiotherapy and chemotherapy. The combined application of multiple tumor markers can improve the efficiency of detection.
However, for a small nodule of 6mm in the lung, the amount of special protein antigen or antibody released is generally small, and the possibility of detecting a positive tumor marker in general is not high. Tumor marker test can play a certain role in screening, but it cannot be used as the main basis for confirming the diagnosis.
To confirm the diagnosis when the lung nodule is 6 mm, it needs to be combined with chest CT, lung nodule histopathology and other tests to clarify, and it is recommended that the patient consult a doctor in time, and carry out the relevant tests under the guidance of the doctor.