Complex sentence: In many cases of cancer, TORS provides an excellent alternative to chemoradiation, which is associated with long-term, potentially harmful toxicities, and to traditional open surgeries, which are highly invasive and prone to serious complications.
Split into simpler sentences: In many cases of cancer, TORS provides an excellent alternative to chemoradiation and to traditional open surgeries. Chemoradiation is associated with long-term, potentially harmful toxicities, and open surgeries are highly invasive and prone to serious complications.