The present disclosure is directed to progastrin monoclonal antibodies, fragments thereof, compositions comprising progastrin monoclonal antibodies, and methods of making and using progastrin monoclonal antibodies and compositions thereof. The present disclosure is directed to methods of treating colorectal cancer with progastrin monoclonal antibodies and compositions comprising progastrin monoclonal antibodies or fragments thereof. The present disclosure is further directed to methods comprising detection of progastrin, including methods of diagnosing colorectal cancer and methods of monitoring efficacy of anti-cancer therapy in subjects suffering from colorectal cancer.本發明係關於前胃泌激素單株抗體、其片段、包含前胃泌激素單株抗體之組合物、及前胃泌激素單株抗體及其組合物之製備及使用方法。本發明係關於用前胃泌激素單株抗體及包含前胃泌激素單株抗體或其片段之組合物治療結腸直腸癌的方法。本發明另外關於包含偵測前胃泌激素之方法,其包括診斷結腸直腸癌之方法及監測抗癌療法對罹患結腸直腸癌之個體之功效的方法。