Background: Third ventricular colloid cysts are uncommon tumors that make up 15 to 20% of intraventricular tumors and 0.2 to 2% of intracranial tumors. Colloid cysts are benign tumors, but they may grow until they block the foramen of Monro, which might result in a fatal accident.
Aim of the Work: Assessment of the efficacy of endoscopic excision(total or subtotal) of the colloid cyst in relation to the size of cyst
Patients and Methods: The research was prospectively carried out at the neurosurgery department of Al-Azhar university hospitals, from January 2019 to December 2021. Included fifteen patients with colloid cyst and they were operated by endoscope for their mass and hydrocephalus.
Results: This study showed that male-to-female ratio was 1.5:1, and the median age was 32.87 years. Headache was the commonest presenting symptom affecting in 93.3% of patients. Most patients (93.3%) were hydrocephalic at time of presentation. The mean cyst diameter was 20.53 mm. The cyst was usually hyperdense in CT scans (60%), hyperintense in T1W MRI (60%) and with variable T2W appearance.
Conclusion: Colloid cysts are usually hyperdense in CT scans and hyperintense in T1 MRI. They may require surgical resection if larger than 1 cm in diameter or causing symptoms to avoid rapid neurological deterioration and unexpected death brought on by CSF flow occlusion. The size of the colloid cyst has no significant impact on of the efficacy of the endoscopic resection of the colloid cyst.