Abercrombe syndrome, or erythropoietic hyperreninemia syndrome, is a condition in which the blood levels of renin, a hormone that regulates blood pressure and natriuresis, are elevated. It may be due to high concentrations of hormones in the adrenal glands, especially when the left side of the adrenal glands produces too much adrenocorticotropic hormone (ACTH). ACTH stimulates hormone production