How could i have developed skin cancer (melanoma) on my lung?

Metastasis: While melanoma is a cancer that starts in the skin, it can spread (metastasize) to other areas including the lung.

Metastasectomy: In some patinets, if they have oligo metastasis (meaning few) and they are confined to the lung, they may benefit from surgical removal of the lung metastasis. This can be done minimally invasively or by video assisted thoracic surgery (vats).

Spread in blood: Cancer can spread to other areas through the lymphatics to lymph nodes or directly invade the blood stream and float and pumped to other areas of the body. Therefore melanoma is a very dangerous cancer where the slightest growth deep into the skin ends up getting into the blood stream. Its a strange disease though as the original melanoma may be resected years before it shows up in other organs.

Immunotherapy and pe: I agree with dr cook, surgery to remove metastatic sites should always be considered if feasible, this is different from masny other type of cancers. More importantly, immunotherapy save life.

Metastasis: Melanoma can spread to lungs from primary sites on the skin. In fact, it is a fairly common site of melanoma metastasis.

Metastasize: The melanoma cells travel from your skin and develop tumors in the lung. Melanoma can travel to any organ in your body.