POMC and neoplasm: Nineteen (91 %) patients had BSIPSS, which showed lateralization of ACTH secretion in 14 (73.7 %; 7 right, 7 left): concordance between lateralization of the tumor on BSIPSS and during surgery was 14/19 (74 %) with 87 % (13/15) concordance in the remission patients vs 25 % (1/4) in the non-remission patients.