What is occult breast cancer, what is survival rate of woman older than 60 who have occult breast cancer?

Occult breast cancer: is breast cancer that first shows up as metastatic disease, usually axillary lymph nodes, but the site of origin of the cancer in the breast cannot be identified. The overall 10 year survival is about 50-70%, although I am not sure how it breaks down by age.

Occult breast cancer: is breast cancer found just by nodal metastasis - without clinically evident disease in the breast. there is huge variability in survival depending on tumor biology and extent of disease - so need more info.

Need more details: There is formally no such condition called occult breast Cancer. Please give details of exactly where is your breast cancer located and how was it found in the first place??. I am wondering if you are talking about DCIS or a lymph node metastases in the arm pit but no detectable primary tumor. Please elaborate further.