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We report the case of a 30-year-old human immunodeficiency virus (HIV)-positive HIV patient who was poorly followed. She was admitted on November 30, 2017, for the management of febrile encephalitis syndrome with motor deficit of the left hemicorps and generalized seizures. In biology, we found a nonspecific inflammatory syndrome. The cerebral imaging without and with injection found a cystic formation multilobed right fronto-parietal of approximately 83 mm × 62 mm, the presence of an annular calcification of approximately 8 mm with a commitment under falcator, and a contralateral ventricle dilation. Treatment with antiepileptic, antibiotic, antiparasitic, and corticosteroid therapy was marked by death the day before the neurosurgical procedure after initial improvement.

Hydatid diseases are still endemic pathologies in developing countries which generally needs surgical treatment. The main aim of the treatment is total cyst evacuation without rupture. Dowling technique is preferable for this aim. There are various complications of hydatid disease surgery which include cortical collapse which is very serious and can be mortal. Our case was a 6-year-old boy diagnosed with a solitary isointense cystic mass in the left parietal region. There was no surrounding edema. The cyst was completely evacuated with Dowling technique without rupture. In about 10 min after evacuation, hemispheric cortical collapse occurred, and the patient developed cardiac arrest. Although cortical collapse is a rare complication, it can cause perioperative mortality. Special care and efforts should be taken as not to form large defects after cyst evacuation to prevent cortical collapse and related mortality.

We report a 9-year-old girl who presented with focal seizures, hemiparesis, headache, vomiting and bilateral optic atrophy. CT scan revealed a giant solitary cyst in the left parietal lobe. Serology and histopathology of the excised cyst confirmed the diagnosis of neurohydatidosis which is a rare cause of childhood seizure.