ECOG performance status
Pronunciation: EE-kog
Also written as: ECOG — Eastern Cooperative Oncology Group
Standardized scale (0-5) measuring a cancer patient's functional ability and fitness for treatment.
Full Definition
The Eastern Cooperative Oncology Group (ECOG) performance status scale is a widely used tool for assessing cancer patients' functional capacity and overall well-being. The scale ranges from 0 (fully active, able to carry out all pre-disease activities) to 5 (dead), with intermediate grades reflecting varying degrees of functional limitation. This assessment is crucial in surgical oncology for determining surgical candidacy, predicting perioperative risk, and selecting appropriate treatment modalities. ECOG performance status strongly correlates with treatment tolerance, surgical outcomes, and overall prognosis, making it an essential component of preoperative evaluation and multidisciplinary treatment planning.
Usage
Usage note: Express as 'ECOG 0' or 'ECOG performance status 0', not 'ECOG score 0'.
In Context
- "The patient's ECOG performance status of 0 indicated excellent functional capacity for major surgical resection." — Preoperative assessment
- "Given the patient's declining ECOG performance status to grade 3, surgical intervention was deferred in favor of palliative care." — Treatment planning note