A brief report: Cerebrospinal fluid rhinorrhea after repetitive nasal swab testing for coronavirus disease 2019(COVID-19).

For the past year, COVID-19 Pandemic has been the biggest focal point of medicine. Due to its novelty and its highly infectious nature, the impact of Sars-Cov-2 on society has been growing rapidly. The primary route for prevention of this highly infectious virus is detection.

Long-term follow-up and results of thirty pediatric intracranial hydatid cysts: half a century of experience in the Department of Neurosurgery of the School of Medicine at the University of Istanbul (1952-2001).

A series of 30 documented cases of intracranial hydatid cyst out of 33 pediatric and 45 total patients admitted to the Department of Neurosurgery of the School of Medicine at Istanbul University within the years 1952-1996 is presented. The pediatric population consisted of 73% of the series. Twenty patients (66%) are alive and well after a follow-up period of 8-45 years (mean 21.

Tethered cord in the adult mimicking the lumbar disc syndrome: report of two cases.

Two adult patients with tethered cords whose symptoms mimicked those of lumbosacral intervertebral disc herniation are reported. Neither one of the patients had cutaneous stigmata, and one had normal plain x-ray examination of the spine. Magnetic resonance imaging in both patients demonstrated tethering of the cord.

Supratentorial intracerebral schwannomas.

A case of frontotemporal intracerebral schwannoma in a 16-year-old girl with epilepsy and progressive hemiparesis of 3 years' duration is described. The histologic diagnosis and possible sites of origin are discussed. In addition, five previously reported cases of supratentorial intracerebral schwannoma are discussed.

Adult aqueductal stenosis presenting with fluctuating hearing loss and vertigo. Report of two cases.

Two cases of aqueductal stenosis presenting with fluctuating hearing loss, tinnitus, and vertigo are presented. Audiovestibulometric assessment of both cases disclosed the characteristic pattern of disorder of the membranous inner ear. Non-tumoral aqueductal stenosis was demonstrated by computerized tomography in one case and by positive contrast ventriculography in the other.