what is a tumor
1 answer
A tumor refers to the abnormal and excessive growth of cells in the body. It can develop in various parts of the body and may be either benign (non-cancerous) or malignant (cancerous). Benign tumors are typically localized and do not spread to other parts of the body, whereas malignant tumors can invade nearby tissues, spread to distant organs through the bloodstream or lymphatic system, and cause serious health issues. Tumors can occur in any body tissue and can be classified based on their origin, such as carcinomas (arising from epithelial cells), sarcomas (arising from connective tissues), lymphomas (arising from lymphatic tissues), and leukemias (arising from blood-forming cells). The diagnosis and treatment of tumors usually involve medical professionals such as oncologists, who specialize in the study and treatment of cancer.