Concerning the proliferative and non‐proliferative tumour subsets (Trouillas A and B), patients with proliferative tumours were significantly younger (40.77 ± SD 13.36 vs 52.70 ± SD 11.92, P < .001, Student t‐test) and showed higher GH levels (median 45.77 vs 26.16, P = .007, Mann‐Whitney test). This evidence concerns the gene GH1 and neoplasm.