ИСТИНА

OBJECTIVE: A retrospective review of results of surgical treatment of 409 patients with colloid cysts of the third ventricle, that underwent surgical treatment at the Moscow Burdenko Neurosurgical from 1981 to 03.2017. All surgical interventions were performed by the first author. MATERIALS AND METHODS: The mean patient age was 36.5 years at the time of diagnosis (range 1–74 years). Acute hydrocephalic symptoms were noted in 80%. In 21 patients (5.6%) asymptomatic colloid cysts were found. The mean cyst size was 15 mm (range 5–52 mm). Transcallosal approach was used in 392 patients (95.8%), transcortical - in 6 patients, and infratentorial supracerebellar - 11. In 51 (13.5%) cases, the removal of the colloid cyst was preceded by shunting operations. In 10 cases, that shunting system was removed intraoperatively. Cognitive disorder before and after surgery were recorded in 53 of the patients according to the Luria method, and memory tests (RAVLT) were performed for 20 additional patients. RESULTS: Complete cyst removal was performed in 395 (96.5%) of the cases (in 3.5% of the cases a small fragment of the cyst capsule was left intact due to fusion with veins and fornix), in 3 cases there was cyst recurrence that required reoperation. The regression of hydrocephalus symptoms was noted in 98% of patients. Half of the patients experienced memory disorders in the early postoperative period, 22 (5.8%) patients presented with Korsakoff’s syndrome. All memory disorders, regardless of severity, regressed with time. 1 patient needed revision due third ventricle hematoma, 4 cases of meningitis (including 1 shunt associated), 5 cases of transient pyramidal symptoms. CONCLUSION: The transcallosal approach allows for radical third ventricle colloid cyst resection with a minimal complication rate. A preliminary assessment of the effectiveness of the supracerebellar infratentorial approach for colloid cyst removal based on 11 cases is given.