Cyst enlargement with progressive symptoms in spinal intradural Neurocysticercosis (NCC) is an uncommon finding after effective treatment of NCC. Neither imaging nor clinical presentation is sufficient to differentiate a sterile arachnoid cyst from recurrence of NCC. We present a case of symptomatic spinal intradural cyst enlargement 16 years after successful treatment of intracranial and spinal NCC with anti-helminthics.
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