Objective: To investigate the clinicopathologic features of undifferentiated small cell carcinoma of esophagus.

Esophagus cancer is to point to former hair the cancerous tumor at esophagus, basically include scale cancer, gland cancer, did not split up caruncle of cellule cancer, cancer.

Most of the metastatic undifferentiated carcinomas are from lungs, especially the anaplastic carcinomas of small cell type.