What are effects of tumor on host?

Location is crucial (small pituitary adenoma compress surrounding cause hypopituitarism, 0.5 cm leiomyoma in wall of renal artery reduces blood supply cause HTN and renal ischemia, small common bile duct carcinoma causes biliary obstruction) Hormone overproduction (adenoma/carcinoma of beta cells cause hyperinsulinism (maybe fatal), adrenal cortex adenomas increase steroids (aldosterone)) Tumor could get into gut cause intestinal obstruction/ infarction/ intussuception.