In UTs, the largest tumor diameter statistically significantly correlated with baseline ACTH (r = −0.391; p < 0.001) and cs-1mg-DST (r = 0.306; p < 0.001), while in BTs, the largest diameter of the two tumors showed a positive correlation with cs-1mg-DST (r = 0.309; p = 0.012). The gene discussed is POMC; the disease is neoplasm.