Hello, On the BraTS 2023 page it is stated that the 2023 dataset has been updated, with changes in preprocessing: > While you can download the BraTS 2023 Adult Glioma dataset from this challenge website, please be aware that it has been updated and incorporated into the BraTS-Lighthouse 2025: Pre- and Post-Treatment Adult Glioma Challenge. The updated dataset for the new challenge underwent different preprocessing, so the BraTS 2023 and BraTS 2025 Adult Glioma datasets are no longer identical. Given this, I would like to clarify the following: 1. The dataset currently available at this link ([https://www.synapse.org/Synapse:syn51514105](https://www.synapse.org/Synapse:syn51514105)), although listed on the BraTS 2023 page, has been updated and is therefore not identical to the dataset originally used in the 2023 challenge. Is that correct? 2. If so, does this mean that results obtained using the currently available training data are not directly comparable to results reported in papers that used the original 2023 dataset? 3. Are results obtained using this dataset ([https://www.synapse.org/Synapse:syn51514105](https://www.synapse.org/Synapse:syn51514105)) comparable to submissions evaluated on the validation/test sets of the still-open 2023 challenge? Thank you in advance for the clarification.