What are the consequences of not getting treatment for breast cancer?

I've seen cases : Of what we call "neglected" breast cancer...And it is not pretty. The skin of the breast can dissolve, bleed, grow, and smell. It can leave deposits across the chest and back, and as it is destroying the breast and skin, cells can travel to brain, bones, liver. These women are miserable and sad...And hard to help.

Disease-Progression: Breast cancers come in many different "shapes & sizes" with some more aggressive than others. However, left untreated, almost all will grow in the breast, eventually breaking thru the skin and leading to an open wound. Such cancers have a higher probability of spreading throughout the body, potentially "taking over" vital organs such as the liver or lungs. Why wait?

Disease progression: Breast cancer progresses from stage 1 to 2 to 3 to stage 4 which is metastatic breast cancer to organs including the brain and lungs and liver and bones. Breast cancer kills by spreading to the organs. Early stage breast cancer has a very high cure rate if treated using conventional modalities including surgery radiation and hormone therapy and chemotherapy depending on the stage and type.