Before revision: Common Toxicity Criteria (CTC), also referred to as the Common Terminology Criteria for Adverse Events (CTCAE), is a standardised classification of side effects used in assessing drugs for cancer therapy.
After revision: The Common Terminology Criteria for Adverse Events (CTCAE), sometimes called the common toxicity criteria (CTC), are a set of criteria for the standardized classification of adverse effects of drugs used in cancer therapy.