D. Lung metastasis

Lung metastasis indicates cancer spread from its original site to the lungs. What happens is the cancer cells break away from the tumor and travels through the blood or the lymph system to other parts, but in this case to the lung area. At this point, it is now considered as secondary lung cancer or metastatic lung tumor. Lung metastasis differs from primary lung cancer, in which case cancer started in the lung.

Some cancers are likely to spread to this degree, such as breast, colorectal, kidney, head and neck, thyroid, testicular, bone cancers, etc. The following are the symptoms of lung metastasis:

(1) a cough that doesn’t go away
(2) shortness of breath
(3) coughing up blood
(4) pain or discomfort in the chest