Definitely,
There is work in Wales @johnmeredith and other places on the same track @varntzen @bna
Personally I would start at the other end @Erik and work down from a broad pattern for anatomic pathology, which is largely understood but which we have never formally agreed on. Then tackle some other generic pattern issues - how to do staging in a way that works for both national reporting and MDT support. That may help guide patterns around direct invasion, tumour margins etc. After that the very detailed requirements that are e.g. unique to Breast cancer microscopy will fall out naturally.
Or perhaps a twin track - one to see how much the clinical requirements for microscopy still line up internationally (essentially a clinical exercise) vs. the work above which is really more informatics.