Can lung cancer cause sudden mental impairment?

MS changes in lungCA: Lung ca can spread to the brain and cause changes in a persons mental status...Making them confused, headache, dizzy, nauseated, or even think they have had a stroke.It can also cause changes in blood calcium and if the calcium goes up the person can get very confused and lethargic.This can happen even when the lung cancer is still very early.

Yes: There are many different mechanisms by which this could happen, such as metastasis to the brain, secretion of various substances by the cancer, effects of chemotherapy or low oxygen in the body because of collapse of the lung or a large pleural effusion, to name a few.