Mitosis domain generalization in histopathology images - The MIDOG challenge.The density of mitotic figures (MF) within tumor tissue is known to be highly correlated with tumor proliferation and thus is an important marker in tumor grading. 
The MIDOG challenge
The goal of the MICCAI MIDOG 2021 challenge was the creation of scanner-agnostic MF detection algorithms. 
MICCAI MIDOG 2021 challenge