“…In controlled studies, this effect was focused primarily on patients with functioning GEP tumours, and was reported to be a very rare event (about 5% of cases) regardless of the dosage or formulation of the drug [16,17,18,19,20,21,22,23]. Tumour stabilization has frequently been observed in patients with GEP tumours treated with somatostatin analogues, and has also been reported in various series of progressive neuroendocrine tumours [16,22,23,24,25]. Indeed, a better and longer sustained response has been achieved in slow-growing tumours, with a 76% response at a median time of 11 months in 1 study [23], a 86% response at a median time of 25 months in another [16] and a 38% response at a median time of 50 months in another [15].…”