From the case:
Pineocytoma (histology)
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/57918/annotated_viewer_json?lang=us"}
The tumor is moderately cellular, composed of cells arranged in large irregular pineocytomatous rosettes. Diagnosis of pineocytoma was confirmed on immunohistochemistry and concordant imaging.