OMG-Octo Atypical: A refinement of the original OMG-Octo database to incorporate atypical mitoses

In this study, we pre-trained our model on the MIDOG 2025 atypical mitoses database (AMi-Br: 832 atypical and 2,888 normal mitotic figures and MIDOG-Atypical (1748 atypical and 10191 normal mitoses), From this model, we inferred to find atypical mitoses within our OMG-Octo dataset and found 10678 potential candidates. Dedicated pathologists reviewed 3024 of them (1378 atypical, 394 apoptotic, 379 normal MF, 399 Noise and 462 Unsure). The results are uploaded here under a CC BY.0 NC ND 4.0 International License. Publications and upates will follow.