tumor doubling time
Time required for a tumor to double in volume, used to assess growth rate and aggressiveness.
Full Definition
Tumor doubling time is a measure of how rapidly a cancer is growing, calculated as the time required for the tumor volume to increase by 100%. This parameter is typically determined through serial imaging studies and mathematical modeling of tumor growth kinetics. Doubling time varies significantly among different tumor types and can range from days for highly aggressive tumors to years for indolent malignancies. Knowledge of tumor doubling time helps predict prognosis, guides treatment timing decisions, and assists in monitoring response to therapy. Rapidly growing tumors with short doubling times generally require more urgent intervention and aggressive treatment approaches.
Usage
Usage note: Provide the calculated doubling time and the imaging studies used for determination.
In Context
- "Serial imaging revealed a tumor doubling time of 45 days, indicating aggressive disease." — Radiology interpretation
- "The prolonged tumor doubling time suggested an indolent malignancy amenable to observation." — Oncology assessment