Combined carcinoid tumor and ganglioneuroblastoma of the lung: a case report.

Carcinoid tumor is a well-differentiated epithelial neuroendocrine neoplasm which is common in the lung. Ganglioneuroblastoma is a moderately differentiated nonepithelial neuroendocrine neoplasm which is very rare in the lung. Neuroendocrine tumors with epithelial and nonepithelial elements are rare in any site and have not been reported in the lung. This case is an example of a primary neuroendocrine lung tumor combining epithelial and non-epithelial components: carcinoid tumor and ganglioneuroblastoma.