... Chapter 081. Principles of Cancer Treatment (Part 4) Palliation Surgery is employed in a number of ways for supportive care: insertion of central venous catheters, control of pleural ... for recurrent pulmonary emboli, stabilization of cancer- weakened weight-bearing bones, and control of hemorrhage, among others. Surgical bypass of gastrointestinal, urinary tract, or biliary ... (Fig. 81-2). Plotting the fraction of surviving cells against doses of x-rays or gamma radiation, the curve has a shoulder that reflects the cell's repair of sublethal damage, followed by...