Esophagus Small Cell Carcinoma, also known as esophageal small cell neuroendocrine carcinoma, is related to lung oat cell carcinoma and squamous cell carcinoma. An important gene associated with Esophagus Small Cell Carcinoma is ENO2 (Enolase 2), and among its related pathways/superpathways are Development EGFR signaling pathway and Hepatocyte growth factor receptor signaling.