Carcinoid crisis is a potentially life-threatening complication of carcinoid syndrome caused by the sudden release of high levels of serotonin and other active substances from a NET. 1,2 This sudden release of active substances may be caused by tumor manipulation during surgery, needle biopsy of the tumor, or the administration of anesthesia …
https://netrf.org/for-patients/living-with-nets/carcinoid-syndrome/carcinoid-crisis/

