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.
myelosuppression
Suppression of bone marrow function resulting in decreased production of blood cells, commonly caused by chemotherapy or...
progression-free survival
Time from treatment start until disease progression or death from any cause.
progressive disease
Tumor response category indicating cancer growth or spread despite treatment.
protocol deviation
Departure from approved clinical trial procedures that may affect safety or data integrity.
pseudoprogression
Apparent tumor progression on imaging that actually represents inflammation or treatment effect rather than true disease...
tumor suppressor gene
Gene that normally prevents cancer development; loss of function contributes to malignant transformation.