Female, 26 years old, status post ventricular mass resection. Postoperative findings are seen compatible with occipital craniotomy for resection of a tumor from the brainstem and fourth ventricle. Most of the enhancing portion of the tumor, that which occupied the fourth ventricle and abutted the inferior vermis, has been resected. A small portion of relatively nonenhancing tumor does remain where it invades the brainstem at the level of the cervicomedullary junction. The operative cavity contains expected fluid and blood product. No new intracranial lesions are seen. Supratentorially, the brain is within normal limits. Apart from deformation of the fourth ventricle, the ventricular system is normal in size and morphology. Inflammation in the temporal scalp is seen bilaterally which may be related to the surgical immobilization device. Patchy opacification the mastoid air cells is noted.
Postoperative findings are seen compatible with partial resection of a tumor from the brainstem and fourth ventricle. A small portion of tumor remains where it invades the cervicomedullary junction.