A 41-year-old gentleman presented to the eye clinic complaining of seeing floaters before both eyes since 2 weeks. On questioning, he admitted getting intermittent dull headache of mild to moderate intensity and dizziness on and off while walking since 2 months. There was no associated nausea or vomiting or other neurological symptoms. He was detected to be a hypertensive few months ago and was on treatment with lisinopril 5-mg daily.\nOcular examination revealed a best-corrected Snellen's visual acuity of 6/6 p in both eyes. Anterior segment examination showed exotropia of about 45° in left eye that was alternating. Rest of anterior segment examination including intraocular pressure was normal. Fundoscopy of the right eye revealed early vitreous hemorrhage. The disc showed slight blurring of margins associated with peripapillary retinal hemorrhages []. Fundus examination of the left eye showed early vitreous hemorrhage and blurring of disc margin. There was a small area of preretinal hemorrhage inferior to the disc []. B scan ultrasound also confirmed early vitreous hemorrhage.\nA diagnosis of bilateral early disc edema with mild vitreous hemorrhage was made, and he was investigated. Contrast-enhanced CT scan of brain showed a well-defined oval nonenhancing hyperdense lesion measuring 2 × 1.9 × 2.3 cm at the anterosuperior aspect of third ventricle bulging through the right foramen of Monro and compressing the left foramen of Monro causing dilatation of both lateral ventricles with cerebrospinal fluid (CSF) seepage []. Fourth ventricle appeared normal. Moderate 0.8-cm midline shift was also seen to the left side.\nA presumptive diagnosis of colloid cyst causing moderate obstructive hydrocephalus was made, and he was referred urgently to the department of neurosurgery. He underwent emergency craniotomy and cyst excision. Histopathological examination of the excised tissue showed cyst contents lined by cyst wall lined by ciliated cuboidal epithelium resting on fibrocollagenous tissue consistent with colloid cyst. Postoperative CT scan showed pneumocephalus and subdural collection in the right frontotemporal region that resolved spontaneously after few days.\nThe patient improved symptomatically following surgery. On follow-up after 1 month, he reported complete resolution of floaters and headache.\nFundus evaluation showed resolving vitreous hemorrhage and disc edema. Follow-up after 3 months showed complete resolution of disc edema and vitreous hemorrhage [Figure and ]. He is being followed up closely for recurrence of symptoms. He has remained asymptomatic for the last 18 months after the intervention.
A 20-year-old lady presented with a 6 months history of progressive headache and memory disturbances. Few days prior to presentation, she had three episodes of generalized tonic clonic seizures. She also had gait disturbances and severe giddiness. Higher mental function examination revealed impaired recent memory. Fundoscopic examination showed bilateral papilloedema. Cranial nerve examination, motor and sensory examination was normal. Plantar reflexes were extensor on both sides and Romberg's sign was positive. Computed tomography (CT) scan of the brain showed isodense lesion located at foramen of Monro with hyperdense areas suggestive of hemorrhage with foraminal obstruction. The lesion was not enhancing on contrast []. Magnetic resonance imaging (MRI) brain revealed obstructive hydrocephalus due to a large lesion in the third ventricle which was homogenously hyperintense on T1-weighted images and homogenously hypointense on T2-weighted images [].\nRight lateral ventricle was entered via right frontoparietal craniotomy and an interhemispheric transcallosal approach. A grayish red, well-defined, soft to firm lesion was reached through the interforniceal approach. Needle aspiration was attempted but was unsuccessful. The surface of the cyst was vascular, so it was coagulated. The cyst wall was thickened and its separation from surrounding tissue was difficult. On opening the cyst, there was no colloid material, but a brownish yellow organized clot was found which was removed piecemeal. The clot was easily separated from the inner cyst wall. After almost complete evacuation of cyst content, the thick wall was held with biopsy forceps with one hand and with the other hand it was dissected from the surrounding parenchymal tissue. A complete excision of the cyst was ensured. Both internal cerebral veins were seen and found intact. Pathological examination confirmed hemorrhage within the colloid cyst. Microscopic examination also showed blood clots containing hemosiderin laden macrophages and many rhomboid cholesterol crystals and chronic inflammatory cells []. Post-operatively she had no seizures. Her memory function completely improved over a 3 week period.