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The CT images of the pulmonary nodule in left upper lobe. A. The lung nodule was indicated on January 22, 2019. B. After 1 cycle of treatment, the nodule showed PR on March 7, 2019. C. The nodule disappeared (CR) after 2 cycles of therapy on April 21, 2019. D. Recurrence of the nodule was excluded on June 5, 2019. E. Four cycles later, the tumor lesion was undetectable on July 4, 2019. CT = computed tomography.
