It compares two treatments for patients with metastatic castration-resistant prostate cancer: [177Lu]Lu-PSMA-617 (a targeted radioligand therapy) and docetaxel (a standard chemotherapy).
If you are looking at a file named with an extension like .r21 , it is likely part of a .
Recent results presented at medical conferences (like ESMO 2025) showed no significant difference in radiographic progression-free survival (rPFS) between the two treatments, though the radioligand therapy had fewer severe side effects.
The study also explores the interaction between p21 (a protein) and RAR (Retinoic Acid Receptor) in how cancer cells differentiate and grow. 🎮 Retro Gaming: Nintendo PR-21
While it most likely refers to the , it could also involve a specific Nintendo game or a split-archive file . 🔬 Clinical Research: CCTG PR21
The most prominent "PR21" is a conducted by the Canadian Cancer Trials Group (CCTG).