Which type of cancer treatment often requires precise planning and multiple sessions?

Radiation therapy often requires precise planning and multiple sessions due to its nature and the goal of treatment. This modality is used to target cancer cells while minimizing damage to surrounding healthy tissue. To achieve this, careful calculations must be made regarding the dosage, angles, and timing of the radiation delivery, which necessitates planning sessions before treatment begins.

In most cases, radiation therapy is not delivered in a single session; instead, patients typically undergo multiple treatments over a series of weeks. This fractionation allows for better tumor control while allowing normal tissues time to recover from exposure.

On the other hand, surgical interventions typically involve a single procedure to remove tumors and surrounding tissues, while localized chemotherapy aims to deliver concentrated drugs into a specific area, often requiring fewer sessions. Palliative care focuses on symptom management rather than direct cancer treatment and does not have the same requirement for multi-session planning as radiation therapy does.