Benign tumors of the lungs 0.9cm are not serious, but if they are malignant, they are relatively serious.
1. benign tumor: if it is a benign tumor, it does not have metastasis and invasiveness, plus the volume is relatively small, usually there will not be any obvious discomfort symptoms, the situation is not very serious, the tumor can be resected through the surgery, the chance of recurrence after the operation is also relatively low, is not prone to recurrence.
2. Malignant tumor: with metastasis and invasiveness, it is more serious compared with benign tumors, but the size of 0.9cm belongs to T1 stage, and seldom has metastasis to lymph nodes and distal organs, so it can recover without radiotherapy, chemotherapy and other treatments after resection through radical surgery.