IGF1 and neoplasm: Patients with tumor-related GHD had a lower 5-year mean IGF-1 SDS compared to those with non-tumor-related etiology (median (25–75% range): 0.08 SD (−1.35–1.15) vs. 1.25 SD (0.97–1.66); p = 0.006), although the median values for both groups were within the upper-normal range.