Medical Oncology Glossary
100 terms total — 6 showing — Last updated 15 Sep 2026
Ki-67 index
A measure of cellular proliferation expressed as the percentage of Ki-67 positive tumor cells, used in cancer prognosis and treatment decisions.
CR
Complete response - complete disappearance of all detectable cancer.
microsatellite instability
Genetic condition affecting DNA repair that influences cancer treatment selection.
microsatellite instability-high
A tumor phenotype characterized by widespread mutations in repetitive DNA sequences, predictive of immunotherapy respons...
microsatellite stable
Describes tumors with intact DNA mismatch repair mechanisms, typically associated with lower response to immunotherapy.
RECIST criteria
Standardized guidelines for evaluating tumor response to treatment in clinical trials.
tumor microenvironment
The complex ecosystem surrounding cancer cells, including immune cells, blood vessels, and supportive tissues that influ...