Chronic Diarrhea Due to Guanylate Cyclase 2c Overactivity, also known as congenital diarrhea 6, is related to diarrhea 6 and dysentery. An important gene associated with Chronic Diarrhea Due to Guanylate Cyclase 2c Overactivity is GUCY2C (Guanylate Cyclase 2C). Affiliated tissues include breast and lung.