My mother who is 54 in Ethiopia(east africa) had a biopsy about two months ago and the pathology report notes that the axillary mass( a firm gray white mass 10 cm C/S solid gray white, Under the microscopic result: Fibrous stroma infiltrated by atypical cells forming, papillae, glands, solid sheets. Moderate amount of mitosis seen. Axilla-Moderately differentiated adenocarcinoma. My first question is, is there any way to conclude that this is breast cancer? If it is breast cancer, does it not start in the breast and in this case it the cyst started under her arm and am a bit confused if it is breast or other type of cancer? The doctors had done mamogram and ultrasound but found no cancer in her breast nor in any other organ. Secondly, approximately what stage of breast cancer would be estimated from the pathology report? Thank you so much for your time to answer my questions.