1 in ______females will have cancer of breast in their lifetime - 1 in 8, how is early stage breast can treated - lumpectomy and rt, when should a mastectomy be done? - when unable to get clear margins, breast cancer arises from the ______of the ducts. - epithelium , how can we tell we are in the thoracic region - ribs, lung, point out the vertebral body, pedicles, transverse process and spinous process, what muscles does the breast lie on - pectoralis major, minor and serratus, 3 major pathways of the breast lymphatics - axillary, internal maxillary, transpectoral, level I axillary nodes - nodes lateral to the pectoralis minor, level II axillary nodes - nodes under the pectoralis minor, level III axillary nodes - nodes lie superior to the pectoralis minor, what are the borders of tangential irradiation fields - medial - midline, lateral -mid axillary line, superior - first costal interspace, inferior -1.5 below inframammary fold, why is the slant board used - to compensate for slope of chest wall and sternum, tolerance dose to the heart is : - 40 Gy, what happens if we go tolerance of heart - pericarditis , tolerance dose to lung - 1.7 Gy, branchial plexus - 55-60 Gy, what happens if go over tolerance dose to brachial plexus - nerve damage, when is the scf field treated - 4 or more positive axillary nodes, why is the scf field angled 10- 15 degrees - to avoid txing spinal cord and esophagus, what is the regime for hypofractionated tx - 42.5 Gy in 16 fx, why are the internal mammary nodes not included routinely - increased morbidity to heart, total dose for standard fractionation - 60-66.4 Gy,

Breast Cancer

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