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Search form. Causes. The cause or causes of lymphoma are largely a mystery. There may be some genetic predisposition, or it may be caused by an environmental trigger such as pollution. There is not, however, sufficient evidence to provide a definitive answer.
Pleural effusion can be caused by cancer cells spreading to the pleura. It can also develop if cancer cells block or change the flow of lymph fluid in the pleural cavity. The following cancers are more likely to cause pleural effusion: lung cancer. breast cancer. non-Hodgkin lymphoma. Hodgkin lymphoma. ovarian cancer.