Pre-school male, five years old, from a rural area of Santiago del Estero province, breeding area of cattle and with the habit of feeding pets (dogs).
She presented progressive ataxia and decreased visual acuity of three months of evolution.
Magnetic resonance imaging (MRI) of the brain showed a 7 cm diameter right temporoparieto-occipital cystic lesion.
Abdominal ultrasound and chest X-ray were normal.
Serology with indirect hemagglutination test (IHA) for hydatidosis was negative.
There were no changes in blood count or general tests.
She was treated with albendazole until complete surgical resection of the cyst.
Intrasurgical rupture of the cyst occurred without further complications.
Histopathology confirmed the presence of E. granulosus.
He continued with albendazole and praziquantel for three months due to the surgical accident.
During the 10-year follow-up there were no secondary foci or sequelae related to hydatid disease and cyst rupture.
