CHGA and digestive system neoplasm: Those suffering tumors located within the small intestine or right-sided colon, higher tumor burden, metastatic disease to the liver, and high levels of serum or urine 5-hydroxyindolacetic acid and serum chromogranin A were found to be at higher risk of developing carcinoid crisis, as illustrated in Table 1 (Jia et al. 2022; Rogoza et al. 2022; Keizer et al. 2008; Gade et al. 2020; Tapia Rico et al. 2018; Olmo-Garcia et al. 2020).