IGF1 and neoplasm: Disease-specific factors that were identified from cross-sectional and longitudinal studies were biochemical control (n = 23), IGF1 (n = 17), GH (n = 11), hypopituitarism (n = 10), disease duration (n = 8), tumor size (n = 5), duration of remission (n = 4), nadir GH (n = 3), change in IGF1 (n = 2), and follow-up duration (n = 2).