NS-02GIANT COLLOID CYST IN A CHILD: COMPLETE RESECTION USING A MONOPORTAL ENDOSCOPIC APPROACH

Abstract

Background:Colloid cysts are slow-growing, endodermal lesions lined by columnar epithelium with mucin-secreting goblet cells and with a gelatinous centre of variable viscosity. They account for less than1%of all intracranial tumours. They usually present in adults and are rare (especially larger lesions) in children. We share our experience of endoscopically managing a giant colloid cyst in a child and present our review of the literature. Methods: Case report including picture and video presentations of the operative intervention and review of the literature, using Pubmed. CASE REPORT: A 16-year-old boy presented with a progressively worsening severe headache over the course of 1 day which was associated with vomiting. Magnetic resonance imaging (MRI) of the head revealed a large cystic lesion (measuring 24x24x38mm) in the region of the foramina of Monro causing acute obstructive hydrocephalus. Total resection of the cyst using a purely endoscopic monoportal approach was performed with resolution of the hydrocephalus and symptoms post-operatively. The lesion was consistent with a colloid cyst histologically. DISCUSSION: Our literature review showed that, although cysts.3 cm have been reported, they are extremely rare and even more so in the paediatric population with only two cysts larger than this previously reported-neither of which were managed endoscopically. Conclusion: This is the first report of a giant colloid cyst in a child that was resected using a purely endoscopic monoportal approach. The case demonstrates the feasibility and safety of this approach in treating giant colloid cysts in the paediatric population.