The ectopic expression of the gastric inhibitory polypeptide, is frequent in adrenocorticotropin-independent bilateral macronodular adrenal hyperplasia, but rare in unilateral tumors. - Groussin,L.; Perlemoine,K.; Contesse,V.; Lefebvre,H.; Tabarin,A.; Thieblot,P.; Schlienger,J.L.; Luton,P.; Bertagna,X.; Bertherat,J. (J Clin Endocrinol Metab, 2002)