Wednesday, August 29, 2007

Breast cancer (cancer) radiotherapy period shortening possibly

Breast cancer (cancer) radiotherapy period shortening possibly


 When the strength irregularity radiotherapy which applies radiation to the target accurately (IMRT) with utilization, the exposure per 1 days is increased, the breast cancer (the cancer) remedy period of the patient from the former 6~7 week can be shortened in the only 4 weeks, the research result, was published to the medical magazine “International Journal of Radiation Oncology Biology Physics” June 1st number.

 The american Fox Chase fox chase cancer center which does (Philadelphia) according to Gray Freedman doctor, with the breast cancer patient where the tumor is small at least, with combined use of tumor extraction technique and radiotherapy, being able to obtain survival ratio and the healing ratio which are equal to breast excision technique has been supported report sufficiently. But, the woman who steps on two feet from the fact that the 6~7 week is required is many in radiotherapy, shortening in period has become important topic. In several research, it is examined concerning the lighting from outside the body and the remedy of 1 weeks which jointly use the pad of the radioactivity seed, but this remedy is suited for only the patient of the extremely part where the tumor quite is small.

 In the latest research, the remedy where the dose per 1 days is higher than the normality 75 women of the breast cancer making use of IMRT targeting (the even 52 years old), was executed, the side effect was inspected. With until recently you say that it is not the case that total of the dose becomes many, in comparison with this 4 weekly remedy it is 56Gy meter 60Gy (the unit which shows Gray and the absorbed dose) vis-a-vis irradiating with remedy of the usual 6~7 week. With IMRT, quite be able to irradiate radiation to the specific region inside the tumor or the tumor accurately making use of the X-ray accelerator which the computer controls, it is possible to leave being bombed of peripheral organization in minimum.

 As for the result of short term being satisfactory, as for the side effect which exceeds former remedy it has not come out. It could recognize skin obstacle in the patient of part, but it was settled to 6th week, appearance of the skin returned 6 weeks later, similarly to before the remedying from remedy end. In order in the future, to verify the presence of long-term problem, pursuit of 5 year is done. From past research, it is found that heart diseased risk of the woman who receives radiotherapy to the eighties is high, but if IMRT is used, being bombed of the heart decreases, says that it is the expectation which can lighten also risk. 

 However, also Freedman has recognized the fact that it is the fault that the facility which can be utilized is limited to IMRT. In addition, the latest research being small-scale, also the point where doubt remains furthermore the point where it has the necessity to verify and, long-term concerning the possibility of virulence and recurrence is pointed out from the other specialist.

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