5mm solid lung nodules are not always malignant.
5mm solid lung nodules may be pneumonia, tuberculosis, tumors, etc. Inflammatory nodules caused by infection, Mycobacterium tuberculosis are benign, and may shrink and disappear by taking drugs such as amoxicillin, cefaclor, isoniazid, rifampicin and so on.
Lung cancer may also present as solid nodules, but it is difficult to clarify the nature of nodules by pathologic biopsy for 5-mm solid lung nodules. Therefore, patients whose nodules do not shrink after anti-infective and anti-tuberculosis treatments should be followed up as prescribed by their doctors to observe changes in the size of the nodules, and the nature of the nodules can be clarified by pathological biopsy if the nodules grow further.
Therefore, patients with 5mm solid lung nodules should go to the hospital and receive standardized treatment under the guidance of the doctor.