Figure 1.

Overview of cohort selection. A high number of patients quit the study and changes of therapy during the 3 months of observation resulted in a high drop-out rate. In five patients, no metastases with an increased uptake of [¹⁸F]-labeled fluorodeoxyglucose (¹⁸F-FDG) were found: in two patients, lesions turned out to be inflammatory (lung and liver), in one patient, a spinal meningeal melanocytoma was finally diagnosed and in two patients, suspicious lesions did not show an increased glucose consumption and were therefore not rated as metastases. CIT, checkpoint inhibitor therapy.