Hu H, et al. - Although catecholamine-producing carotid body tumors (CBTs) operations were safe, this retrospective cohort study was conducted by researchers to explore the connection between prognosis and endocrine functions. Between 2009 and 2018, patients diagnosed with CBTs were analyzed. By using statistical methods, plasma catecholamine was studied as a variable of surgical outcomes and prognosis. According to their plasma catecholamine, patients who suffered CBTs and had operations were divided into 2 groups (normal group and high group). It was noted that patients in the normal group experienced more or heavier complications of the surgery like neurological complications and blood loss vs those in the high group. In both groups, however, there was no significant variation in overall survival, local recurrence, and remote metastasis. An elevated plasma catecholamine level was a predictor for improved CBTs operative results. This resulted in additional short-term surgical complications for non-functional CBTs.