the systemic effects, including flushing, palpitations, diarrhea, and cramps, resulting from increased blood levels of serotonin secreted by a carcinoid.
Main Entry: carcinoid syndrome Function: noun : a syndrome that is caused by vasoactive substances secreted by carcinoid tumors and is characterized by flushing,cyanosis, abdominal cramps, diarrhea, and valvular heart disease