Abstract:Quadrigeminal cistern arachnoid cyst is rare and not usually located in the tectal plate region. Such a cyst may extend to the surrounding area and compress adjacent structures due to cystic expansion. Arachnoid cysts occasionally are associated with hydrocephalus and produce related symptoms. In our case, a 20-month-old boy presented with developmental regression and macrocephaly. Image study of the brain demonstrated a large cyst on the superior portion of the posterior fossa with extension to the supratento… Show more
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