Dear @BraTSLighthouse2025Participants , This message provides an important update concerning the evaluation procedure for the** BraTS-GLI **(Glioma Segmentation on Pre- and Post-treatment MRI) task. The BraTS-GLI challenge incorporates both pre-treatment and post-treatment MRI scans within its dataset. A notable distinction in post-treatment scans is the potential inclusion of an additional label representing the resected cavity in patients who have undergone surgical intervention. The training and validation sets for pre- and post-treatment data are currently provided separately. We have implemented an adjustment for the final testing phase. To enhance the clinical relevance of the evaluation, we have decided to facilitate the distinction between pre-treatment and post-treatment MRIs for participants during the testing phase. Specifically, participants will be able to differentiate between pre-treatment and post-treatment scans by examining the image filenames. A detailed description of the filename conventions is available on the BraTS-GLI Wiki page at [BraTS-GLI Wiki page](https://www.synapse.org/Synapse:syn64153130/wiki/631053). Therefore, participants have the option to develop and utilize two distinct models: one for pre-treatment gliomas and another for post-treatment gliomas. For the testing phase submission, however, these models **must **be integrated and submitted as a **single** containerized pipeline. Please note that the evaluation in both the validation and testing phases will continue to be performed on all cases collectively, irrespective of their treatment status. We trust this clarification aids your preparation for the Glioma challenge.