Table 1.

Guidelines for Imaging Modality, Target Lesions, and Tumor Measurements according to WHO, RECIST 1.0, and RECIST 1.1

Source.—References 10, 30–34.

^*Nonmeasurable lesions according to RECIST include other lesions that do not meet the criteria as measurable lesions, such as small lesions with a longest diameter of < 10 mm, skeletal metastases, without a soft-tissue component, ascites, pleural effusion, lymphangitic spread of tumor, leptomeningeal disease, inflammatory breast disease, cystic or necrotic lesions, lesions in an irradiated area, and an abdominal mass not confirmed by imaging, are recorded as “non-target lesions” (31,32). Lymph node measuring ≥ 10 mm but < 15 mm in short axis is considered “non-measureable” and therefore recorded as “non-target lesions” according to RECIST 1.1 (32,33).