Mixed glioneuronal tumors: recently described entities.

CONTEXT

Several distinctive mixed glioneuronal tumors that warrant recognition as clinicopathologic entities have been recently described by neuropathologists.

OBJECTIVE

To summarize important clinical, radiologic, and pathologic findings for 3 novel glioneuronal tumors (papillary glioneuronal tumor, rosetted glioneuronal tumor, and rosette-forming glioneuronal tumor of the fourth ventricle).

DATA SOURCES

Recent reports in the pathology literature and the authors' experience with mixed glioneuronal tumors at a major cancer center.

CONCLUSIONS

Histologic features enabling recognition of these recently described glioneuronal tumors are presented along with remarks concerning the classification of mixed neuronal and glial tumors exhibiting unconventional appearances.