ABSTRACThalos around objects as well as headaches. His visual acuity was 20/60 in the left eye and 20/20 in the right eye and visual field testing revealed concentric narrowing. Fundoscopic examination revealed left primary optic atrophy. Endocrine examination was normal.The magnetic resonance imaging (MRI) ( Figure 1A-D) showed a 1.8 cm extra-axial, well-defined, slightly lobulated lesion adjacent to the left anterior clinoid process and planum sphenoidale, compressing the optic nerve and the chiasm. The anterior cerebral artery (A1) was abutting the posterior surface of the tumor but was not encased. Most of the tumor was hypointense on T1-weighted images, enhanced uniformly, and showed heterogeneous intensity on T2-weighted images. There was a small cystic component to the tumor postero-inferiorly. The tumor did not have an obvious dural attachment and a dural-tail could not be identified. It was clearly separate from the pituitary gland and pituitary stalk. There was compression of the left optic nerve with no clear plane of separation. Likewise there was edema along the optic tracts bilaterally, more so on the left side. The preoperative █ INTRODUCTION H emangioblastomas (HBLs) are benign vascular tumors of the central nervous system accounting for approximately 2% of all intracranial neoplasms (3). They are often associated with von Hippel-Lindau (VHL) disease (1). Only 22 cases of optic nerve hemangioblastoma (ONH) have been reported in the literature. They often mimic meningiomas or optic nerve gliomas and are frequently misdiagnosed preoperatively. There has been only one other case of a HBL of the optic nerve producing optic tract oedema (9). We describe a case of an ONH without VHL, mimicking a meningioma preoperatively with optic tract edema. We review the visual outcomes of these patients as they have significant clinical implications. Such a review has not been done before in the literature.
█ CASE REPORTA 67-year-old man presented with a 1-year history of episodic blurring of vision in the left eye. He also complained of seeing Supratentorial hemangioblastomas (HBLs) are exceedingly uncommon. They account for less than 5% of all central nervous system HBLs. The commonest location is the cerebral cortex. Rarely, they can involve the visual pathway. Most of the reports have focused on the differential diagnosis, since depending on the location they can often resemble optic nerve gliomas or meningiomas of the optic nerve sheath. In this study, we describe a 67-year-old man with progressive diminution of vision in the left eye with an optic nerve hemangioblastoma. There was no history of von Hippel-Lindau disease. We discuss the diagnostic challenges, and review the visual presentation and visual outcomes in these patients. This report, we believe, may add further clarity in counseling patients with an optic nerve lesion and the factors in surgical decision-making.