In recent studies breast cancer patients undergo ultrasound of respective axillary lymph nodes to diagnose cancer before breast surgery in which about 30% of individuals were considered obese, with BMI (body mass index) of 30+ and remaining patients were categorized as under normal weight and overweight but not obese. Obesity can change the look of lymph nodes and make difficult to identify either by physical examination or by imaging studies. But using ultra sound imaging studies of lymph nodes in obese cancer patients may provide better specificity and accuracy, which is more accurate in over weight individuals than thinner individual. Soft fatty tissue can compress during ultra sound imaging procedure and can provide good images when compared to thinner individual as under lymph nodes may present so close to the surface. But surgeons do not rely only on the ultra sound imaging. Surgeons do not rely on ultrasound alone to determine whether or not breast cancer has spread; it is one of several sources of information used to guide treatment. If ultra sound manifestations reported negative, a sentinel node biopsy may be done at the time of breast surgery and in case of ultra sound imaging shows any abnormal lymph nodes, then an aspiration of lymph nodes can be done or can suggest chemotherapy before breast surgery.