Small nodules in the upper lobe of the right lung and scattered pulmonary macules in both lungs may be due to benign and malignant tumors of the lungs, tuberculous balls, inflammatory pseudotumors, metastases, and inflammation of the lungs. Lung macules are usually secondary to inflammatory lesions in the small bronchi.
1. Small nodules in the lobes of the lungs: small nodules appear in the lungs, which may be tuberculosis balls, with no enhancement and only mild enhancement seen in the peripheral ring. Benign tumors of the lungs, may show no enhancement, mild uniform enhancement.
Malignant tumors of the lung, often more obvious uniform enhancement, central enhancement, mostly transient enhancement. Pneumonic pseudotumors, may show ring-like enhancement and mild uniform enhancement. In addition, inflammation of the lungs may also appear as small nodules.
2. Bilateral pulmonary maculopapular: pulmonary maculopapular is usually secondary to inflammatory lesions of small bronchial tubes, such as pneumonia, emphysema, tuberculosis. Because of the inflammatory disease of small bronchial tube, there will be edema, narrowing, partial obstruction of the lumen, which will produce valve effect, make the air enter into the alveoli but not easy to be discharged, and make the pressure of the alveolar cavity rise.
It can also be characterized by inflammation that damages the lung tissue, the alveolar walls and septa gradually rupture due to the increased intra-alveolar pressure, and the alveoli fuse with each other to form large air-containing cystic cavities.
Small nodules in the upper lobe of the right lung and scattered pulmonary bullae in both lungs require medical attention as soon as possible to avoid serious complications.