Fig. 2.

Kaplan–Meier survival curves in the non-progression and progression groups for a the survival since the first diagnosis of pheochromocytoma/paraganglioma (time after Dx of PPGL) and b since the first diagnosis of metastases (time after Dx of M-PPGL). The durations from the first diagnoses of pheochromocytoma/paraganglioma and malignant disease until follow-up in the non-progression group (solid lines; time after Dx of PPGL, 15.3 ± 7.6 years; time after Dx of M-PPGL, 8.1 ± 4.4 years) were significantly longer than in the progression group (dashed line; time after Dx of PPGL, 5.9 ± 4.1 years; time after Dx of M-PPGL, 2.9 ± 3.6 years), as determined by Kaplan–Meier analysis with the log-rank test (χ ² = 10.04; p < 0.01, and χ ² = 5.49; p = 0.02, respectively)