A case of successful fenestration of an arachnoid cyst in a patient with Edwards syndrome

Edwards syndrome, also known as trisomy 18, is the second most common autosomal trisomic disorder after Down syndrome (trisomy 21). This disease is characterized by phenotypic features, abnormalities of the musculoskeletal system, cardiovascular system, digestive system and genitourinary system, as well as the central nervous system. In the central nervous system, the most common abnormalities are cerebellar hypoplasia, agenesis of the corpus callosum, microgyria, hydrocephalus and myelomeningocele. The article presents a clinical case of successful fenestration of a congenital arachnoid cyst in the right lateral ventricle in a child with Edwards syndrome. Several months after birth, the child’s cranial capacity increased to 39 cm, cranial sutures were spread, and fontanelles were bulging and enlarged. Based on the clinical picture and neuroimaging results, the child had occlusive hydrocephalus. Endoscopic fenestration of the cyst was performed. In our opinion, in this case, the use of endoscopic fenestration of the arachnoid cyst was performed to improve the child’s quality of life and showed good clinical results.