Lab. Tests What is Prostate Specific Antigen (PSA)? Scholar Idea October 21, 2021 Prostate specific antigen (PSA) is a protein produced primarily by cells in the prostate, a small gland in males that encircles the urethra and produces a fluid that makes up part of semen. Continue Reading Previous: What is Antinuclear Antibody (ANA) test?Next: What is Cystatin c test? Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Related Stories Lab. Tests What is Fructosamine test? Scholar Idea October 21, 2021 Lab. Tests What is Cystatin c test? Scholar Idea October 21, 2021 Lab. Tests What is Antinuclear Antibody (ANA) test? Scholar Idea October 21, 2021