Prolactinoma (n=3), (GH+PRL) plurihormonal tumor (n=2), somatotroph (n=5), thyrotroph (n=2), corticotroph (n=2), and NFPA (n=7): (1:PIT1, 2SF1, 3 TPIT and 1 null cell) tumor samples. This evidence concerns the gene GH1 and neoplasm.