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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.
The causes of pheochromocytoma are multifactorial, meaning many factors contribute to the cause of the condition. In most cases, both genetic and environmental factors play a role. About 25 percent of cases are part of a hereditary syndrome.