SMS-oncology (Specialized Medical Services-oncology) is a contract research organization dedicated to clinical oncology and hemato-oncology studies. It provides drug development, medical writing, clinical operations, regulatory affairs, pharmacovigilance, biometrics, and other services. The company specializes in early phase oncology trials, immuno-oncology trials, and pediatric oncology trials. SMS-oncology merged with Cato Research to form CATO SMS.