Which treatment option is typically used for localized tumors?

Internal radiation therapy, also known as brachytherapy, is typically used for localized tumors because it involves placing a radioactive source directly inside or very close to the tumor. This targeted approach allows for a high dose of radiation to be delivered to the tumor while minimizing exposure to surrounding healthy tissue. This is particularly effective for cancers that are localized and where precise dosing is crucial for tumor control.

In contrast, chemotherapy is generally used for more widespread cancer treatment, as it circulates throughout the body and can affect both cancerous and healthy cells. External radiation therapy, while also effective for localized tumors, is less precise than internal radiation therapy in certain contexts, especially when the tumor is in a sensitive location. The combination of chemotherapy and radiation therapy is often reserved for more complex cases, such as advanced tumors, rather than purely localized ones. Thus, internal radiation therapy is particularly suited for targeting localized neoplasms effectively.