Two cases of neuroendocrine carcinoma, complicated with ulcerative colitis, were examined. Case 1: The patient developed ulcerative colitis at the age of 38, surgery was performed after a diagnosis of rectal cancer at the age of 53, and the patient was diagnosed with neuroendocrine carcinoma by pathological examination after resection. Post-surgery, metastatic nodules were detected in the liver and lungs. The patient is undergoing chemotherapy at this time. Case 2: The patient developed ulcerative colitis at the age of 59; at 72, a sigmoid colon tumor, in addition to multiple liver tumors, was detected. The patient was diagnosed with neuroendocrine carcinoma following biopsy. Chemotherapy was initiated; however, the patient died of cancer 12 months later.
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