الفهرس 
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Abstract
Axillary adenopathy is a diagnostic challenge, differentiating benign from malignant causes is mandatory. US guided core needle biopsy is considered as a simple and preferred diagnostic tool in all cases of abnormal axillary lymphadenopathy. It’s a cost effective method to assess axillary lymph nodes.
Cost Benefit Analysis is a method for assessing the economic efficiency of proposed public policies through the systematic prediction of social costs and social benefits.
Aim of study:
To assess the cost benefit of ultrasound guided core biopsy from abnormal axillary lymph nodes without suspicious breast findings.
This cross sectional analytical study was conducted among female patients who had biopsies of abnormal axillary LNs and in whom breast imaging MRI were unremarkable if US or mammography show no abnormality in the Radiology Department of Suez Canal University hospitals, in corporation with Oncology Teaching Hospital in Ismailia, Egypt.
The study included patients aged 18 to 70 years. Unremarkable imaging of the breast is defined by (BIRADS) score < IV at mammography , US and MRI. Female patients presenting with a palpable incidentally seen on US signed an Informed Consent Form authorizing their inclusion into the study.
We excluded the patients who could not provide the informed consent or whom had previously undergone axillary surgery or had previous radiotherapy, Those with a history or imaging findings suggestive of systemic lymphadenopathy such as collagen vascular disease, HIV, or other autoimmune or suspected para neoplastic conditions , Patients who had bleeding disorder or