When do you prefer to use bolus for treating superficial tumors adjacent to or involving the skin surface, especially for complex surface anatomy in the pelvis, head/neck, and extremity regions?

There is not a single answer to this question, as it depends on the specifics of the geometry, treatment technique (photons vs. electrons, beam angles, energy used, etc.), depth and size of the tumor, and other technical factors. Since almost no one has access to superficial or orthovoltage X-rays w...