Enterogenous cyst of the cervicomedullary junction. A case report.

Enterogenous cyst of the cervicomedullary junction extending from C2 level to the anterior aspect of the medulla oblongata was diagnosed in a 23-year-old male with a one month history of episodic tetraparesis and bilateral horizontal nystagmus. The cyst was removed subtotally except for a small portion at the point of the attachment to the anterior aspect of the medulla oblongata by a laminectomy of C1-C2 and a suboccipital craniectomy. Histopathological and immunohistochemical examinations revealed that the cyst originated exclusively from the endoderm.