Solid nodular shadows in the diagonal fissure of the left lung are not serious if they are caused by a benign disease such as a malignant tumor, but are more serious if they are caused by a malignant tumor such as lung cancer.
The left lung can be divided into upper and lower lobes, and the bifurcation of the two lobes (interlobar fissure) is called oblique fissure. Lung nodules can be categorized into solid nodules and ground-glass nodules. The malignancy rate of solid nodules is low, about 7%.
Solid nodules at the diagonal fissure of the left lung may be benign diseases such as granulomas, malignant tumors, rheumatoid nodules, etc., which are not serious and can be improved or cured after medication or surgical treatments; if they are malignant tumors such as lung cancer or metastatic carcinoma, they will be more serious, and if not treated in time, they may lead to the enlargement of foci, local proliferation and distant metastasis, or even endanger the life of the patient.
It is suggested that patients should consult the doctor in time to determine the cause of the disease according to the examination results of nodule size, morphology and tumor markers, and follow the doctor’s instructions for follow-up, further examination or treatment.