large cell neuroendocrineneuroendocrine cells stomachsmall cell neuroendocrine cancersmall cell lung cancer neuroendocrinesmall cell endocrine carcinomasmall cell endocrine cancersmall cell cervical cancer treatmentislet cell cancersmall cell cervical cancer prognosisislet cell pancreatic cancercarcinoma with neuroendocrine featuresneuroendocrine small cell carcinoma