Oncology · Radiation Oncology
Brain Metastasis Velocity calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 0–200 metastases
Cumulative count of new brain metastases over the time since first stereotactic radiosurgery.
Allowed range: 0.01–30 years
Time in years. Zero years is not scored. Under 4 per year is low, 4 through 13 is intermediate, and over 13 is high.
Result
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Clinical inputs
- New brain metastases since first radiosurgeryAccepted range: 0 to 200
- Years since first radiosurgeryAccepted range: 0.01 to 30
Primary source
Farris M et al. Brain metastasis velocity: a novel prognostic metric predictive of overall survival and freedom from whole-brain radiation therapy after distant brain failure following upfront radiosurgery alone. Int J Radiat Oncol Biol Phys. DOI: 10.1016/j.ijrobp.2017.01.201. PMID: 28586952. Velocity is the cumulative number of new brain metastases divided by years since first stereotactic radiosurgery. Low is under 4 new metastases per year (median survival 12.4 months), intermediate is 4 through 13 (8.2 months), and high is over 13 (4.3 months). (2017)
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