The landscape of breast cancers is ever evolving, and organizing one's thoughts on how these relate to one another can be challenging.

In a recent attempt to review the latest WHO breast tumor book, it became evident that one method to structure these tumors is via their ER status. ER status neatly (mostly) segregates primary breast tumors in a way that allows the development of highly dimensional pictographic representation.

I hope you find this helpful.

- Chandra