Head and neck cancer radiotherapy is used more often, the better efficacy of an integrated approach, applicable to non-integrated large parts of deep, sensitive to radiation, estimated after surgical resection or standard easily learn a thorough pathology report margins positive cases, there are mainly preoperative radiotherapy and postoperative radiotherapy two.
(1) preoperative radiotherapy
1) The role of preoperative radiotherapy:
good blood supply because of the tumor, the higher the amount of oxygen-containing cells of radiation-sensitive, cell metabolism, a large number of cells in mitosis (M phase), and ionizing radiation on the body for strong destruction of dividing cells, so the tumor to radiation sensitive.
can induce tumor regression to facilitate resection of unresectable or make a large reduction in tumor size can be removed, but also to make more steps to reduce the tumor and the surrounding adhesions, increase the resection rate and reduce the bleeding.
In the search operation can reduce head and neck cancer when the tumor cells growing local recurrence or distant metastasis opportunities.
local and systemic conditions of patients can improve, enhance physical fitness, is conducive to surgery and reduce postoperative complications.
damage can be reduced but the nature of the operation, which will help preserve the organ's appearance and function.
2) preoperative radiotherapy adverse factors:
dose is limited: if a large dose of radiation can cause serious skin reactions or necrosis, resulting in wound healing.
reduce the tumor after 1 so that the original boundary is unclear, surgery may lead to cutting edge enough.
due to tumor shrinkage, some patients reluctant to undergo surgery, cooperative reduced.
Head and neck cancer radiotherapy, If the tumor is not sensitive to the rays, will delay the timing of surgery.
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