hello Dear friend, I am going to search about breast cancer, this is why I trying to prepare somee abstract to my professor. Your correction is most welcome. Breast cancer is the most common cancer anywhere in the world .Cancer incidence in developing countries is high[1] Breast cancer is the most common malignancy of women in Iran and is the most common type of cancer in Iran is 25.46%.[2] Breast cancer is the first incidental cancer and 5th cause of death due to cancer in Iranian ladies[3]According to the attending physician diagnosed the patient will be treated differently Conservative therapy includes lumpectomy followed by radiation therapy is the standard work.[4]Radiation therapy is a cancer treatment methods That Radiationtherapycan be donein two waysbrachytherapyandTele-therapy.[5]Radiotherapy plays a critical role in the management of early stage breast cancer. Numerous studies have shown that radiotherapy significantly decreases the rate of loco regional recurrence after breast conservation[3,6]and its role in reducing mortality has been addressed by some researchers [7-9] Currently, whole breast radiotherapy is considered the standard of care after breast conservation surgery [7]In radiotherapy ,tumor cells are with ionizing radiation. It is obvious that with more exposure to radiation, tumor cells are destroyed more[10]But due to the amount of healthy tissue around the tumor, the radiation beam is limited. It can not tolerate more than healthy tissue, organ is irradiated[11,12]Devices used in radiotherapy department is different. Making light of machineries, equipments, such as cobalt therapy, brachytherapy, a variety of linear accelerators Although linear accelerator equipment is preferred, Cobalt tele machines may be acceptable as an alternative to postoperative radiotherapy should be considered[4]The main purpose of the radiation dose delivered to the tumor region is homogeneous so that healthy tissue dose is the minimum dose [11,12]Patientcould toleratethe leastside effects ofradiation therapy.Hence ,The quality of radiation therapy Cobalt-60andphoton 9mevwill be considered on breast. Cobalt-60 emits a gamma ray with energy of 1.25MeV .

Dear Bullwinkle, many thanks for your correction Because of connection problem I cann't comment on your correction so I decided to appreciate you in a new notebook. regards sahar

Hello dear friend. Beacuse of some reasone it is long time that I have not come here. But I want restart learning English.Today I have written a paper about breast cancer which is related to my new field. your correction is most welcome. Thanks in advance Supplementary radiation therapy in breast cancer recurrence reduction Breast cancer is the fore most case of cancer in women. It does metastasis frequently. According to official statistics, 1.6 million people are diagnosed with cancer yearly in the world. In Iran this statistics is ten of thousands per year. So that it can be said at this present, we have approximately fifty of thousands of patients with breast cancer in different stage of treatment, which unfortunately are associated with an upward trend. The first formal treatment of cancer, mastectomy procedure, was performed by William Halsted in 1894, involves removing the entire breast tissue, pectorallis muscles and axillary contents. Since then, progress in oncology with the combination of new techniques such as lumpectomy, Combined HRT, Estrogen Therapy and Chemotherapy, made it possible to preserve as much of the breast tissue and increased survival. Among these methods,In addition to direct treatment of some types of breast cancer, radiation therapy method is used as a complementary procedures after other methods such as lumpectomy for cancer recurrence reduction on the same side or the Uninvolved side. But its use is recommended only in so far as its Profit is greater than the its loss. for Example, it has been demonstrated, women with high risk of local recurrence in 4 or more lymph node, radiation therapy is more benefits than disadvantages. But some doctors believe Patients with certain characteristics, such as age over 70 years, a small tumor, No signs of cancer in the lymph nodes and estrogen receptor-positive or marginal surgical site ,can use instead of radiation therapy, hormone therapy after Lampectomy that seems that in some cases negligence in radiotherapy can cause a recurrence of patients. This study was conducted to determine the importance of radiotherapy in patients where radiation therapy is not medically necessary.

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