Background: Neurocysticercosis is a brain infection caused by the larval stage of the tapeworm Taenia (T.) solium. It is the most important parasitic disease of the human central nervous system and represents the most common cause of acquired epilepsy in developing countries.
Case Report: Here, we report the case of a 23-year-old Chinese man who presented to the emergency department with a 7-day history of helmet headache radiating to the nuchal region and associated with vomiting, confusion, and fever. Cerebrospinal fluid (CSF) was clear, with increased pressure, lymphocytic pleocytosis, decreased glucose, and increased protein levels. Bacterial antigen detection test on CSF was negative, as were CSF bacterial and fungal cultures. Despite broad-spectrum antibiotic and antiviral therapy, the patient still complained of insomnia, diplopia, headache, neck stiffness, and pain in the sacral region. A second LP was performed and CSF had the same characteristics as the first LP. A brain and spinal cord MRI revealed widespread arachnoiditis and small septated cysts with CSF-like signal in the cisterna magna, within the fourth ventricle, and at the level of L3–L4. Cysticercus-specific immunoglobin G antibodies were detected by ELISA in the CSF. The patient received albendazole (15 mg/kg/day) and dexamethasone (5 mg/day) for 4 weeks, with progressive resolution of neurological symptoms.
Conclusions: This case shows that, even if rare, neurocysticercosis may be responsible for meningeal symptoms and should be included in the differential diagnosis, especially in patients from endemic countries.

Keywords: Taenia solium, Meningitis, Neurocysticercosis - diagnosis, Neurocysticercosis - physiopathology