The patient went on to have a resection. 

Histology

Sections show tumor composed of sheets of cells with eosinophilic cytoplasm with ovoid to spindled nuclei with evenly distributed chromatin with many interspersed small and larger thin-walled blood vessels. These cells display mild nuclear pleomorphism. Nucleoli and mitoses are not seen.

The tumor cells are positive for inhibin and negative for EMA, CD10 and PAX8.

FINAL DIAGNOSIS: hemangioblastoma (WHO grade I).