Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 5 2 2019 04 07 71 72 Vijay Adabala Department of Anesthesiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, India. Nishith Govil Department of Anesthesiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, India. Rishabh Agarwal Department of Anesthesiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, India Kesari Masaipeta Department of Anesthesiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, India. 2018 12 15 2018 12 30 Accidental finding of yellow colored CSF may pose a sudden dilemma to the mind of anesthesiologist whether to perform the block or not. Yellow coloration of CSF can be due to subarachnoid bleed or raised protein in the CSF. Anesthesiologists should have a working knowledge of this subject which will help in managing the cases peri-operatively with improved outcome. https://aacc.tums.ac.ir/index.php/aacc/article/view/218 https://aacc.tums.ac.ir/index.php/aacc/article/download/218/414