Lung 3cm~4cm nodule can be called lung mass, it is difficult to judge the condition by the size of the lesion alone, and it is necessary to clarify the nature of the pathology, if it is benign, it is generally not serious, if it is malignant, it is more serious.
1. Unserious: If the external features of the lesion change significantly in a short period of time, with no lobulation or very deep lobulation, and the edges become smooth or fuzzy, it is considered to be benign; it may be caused by benign tumors (e.g., pulmonary malignant tumors) or infections, or it may be caused by inflammatory, tuberculosis, vascular, or congenital lesions. The prognosis of such patients is generally good after active treatment, so it is usually not serious.
2. Serious: if the diameter of the lesion increases, the doubling time is in line with the tumor growth pattern, and there are signs of lobulation, burr and/or pleural depression, malignancy is considered; most of them are primary lung cancers, with adenocarcinoma being the most common one and squamous cell carcinoma the second one. Such patients may be life-threatening if not treated effectively, so it is more serious.
It is recommended that patients should have further examination to clarify and follow the medical advice to standardize the treatment if necessary.