10 Medical devices for breast cancer and breast precancer diagnosis and treatment and for diagnosis and treatment of other breast conditions, namely, catheters, stents, aspirator cups, dilators, and other tools for performing breast duct access, namely breast duct access catheters, microcatheters, stents, dilators, endoscopes, ductoscopes, nipple aspirators, and generally breast duct access devices for access, fluid infusion and fluid retrieval; medical equipment for use in fluid infusion and fluid retrieval from the breast duct; medical supply kits containing tools, namely, breast duct access catheters, microcatheters, stents, dilators, endoscopes, ductoscopes, nipple aspirators, and generally breast duct access devices for access, fluid infusion and fluid retrieval, to perform diagnosis and treatment of breast cancer