Clinical Research Papers:
Neuroendocrine carcinoma of esophageal and gastric cardia: clinicopathologic and immunohistochemistry study of 80 cases
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Liangli Hong1,*, Ying Zhang2,* and Zhaoyong Liu3
1Department of Pathology, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
2Department of Pathology, Shantou University Medical College, Shantou, Guangdong, China
3Department of Orthopedics, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
*These authors contributed equally to this work
Zhaoyong Liu, email: firstname.lastname@example.org
Ying Zhang, email: email@example.com
Keywords: neuroendocrine tumor; esophageal; gastric cardia; prognostic
Received: June 21, 2017 Accepted: November 26, 2017 Published: December 22, 2017
Neuroendocrine carcinoma (NEC) of the esophagus and gastric cardia is a rare tumor, and the Chaoshan region has one of the highest incidences of esophageal and gastric cardia cancer (GCC) worldwide. The aim of this study was to characterize the clinicopathologic features of esophageal NEC (n = 67) and gastric cardia NEC (n = 13) cases identified over a 9-year period in the Chaoshan region. Esophageal NECs were either purely NEC (n = 47) or mixed with squamous cell carcinoma or adenocarcinoma (n = 20). For GCC; pure NEC was found in 5 cases, whereas 8 cases were mixed with adenocarcinomas. The majority of esophageal and gastric cardia NECs was of the small cell type, and 24/67 esophageal and 5/13 gastric cardia patients were found with lymph node metastasis. Immunohistochemistry was performed in all cases, and positive staining for synaptophysin (Syn) was found for all cases, with half the esophageal NEC cases being also chromogranin A (CgA)-positive. In the multivariate Cox regression model, lymph node and further metastasis were independent prognostic factors for esophageal NEC. Our study revealed the clinicopathological features of esophageal and gastric cardia NECs in the Chaoshan region and found mixed NECs patients may have a better prognosis than pure NECs patients, which may provide therapeutic clue for treating this rare tumor.
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