WHO criteria in tumor response

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The WHO criteria were developed in the 1980s under the auspices of the World Health Organization (WHO) to standardize reporting of cancers in clinical trials.​ Nowadays, newer criteria often based on the WHO criteria (such as RECIST, mRECIST, Choi criteria, Lugano response criteria), have widely replaced the WHO criteria in clinical practice .

Complete response

  • no lesions detected for ≥ 4 weeks

Partial response

  • ≥ 50% decrease in sum of the products of diameters
    • confirmed at ≥ 4 weeks

Progressive disease

  • ≥25% increase in products of diameters in one or more lesions
  • new lesions

Stable disease

  • none of the above

See also