Infection of a sylvian Galassi II arachnoid cyst after craniotomy for resection of a parasagittal meningioma.

Arachnoid cysts are CSF-containing entities that rarely are symptomatic or warrant neurosurgical intervention. In addition, infection of these lesions is an even rarer event, with only four reports in the literature capturing this. In this report, we present the case of a 79-year-old man presenting with paraparesis, secondary to a right parasagittal meningioma, with an incidental asymptomatic right sylvian arachnoid cyst (Galassi type II). The initially planned surgery was postponed for 3 months, due to COVID-19 restrictions, and he was kept on high dose of steroids. Following tumour resection, the patient developed bilateral subdural empyemas with involvement of the arachnoid cyst, requiring bilateral craniotomies for evacuation of the empyemas and drainage of the arachnoid cyst. Suppuration of central nervous system arachnoid cysts is a very rare complication following cranial surgery with the main working hypotheses including direct inoculation from surrounding inflamed meninges or haematogenous spread secondary to systemic bacteraemia, potentiated by steroid-induced immunosuppression. Even though being a rarity, infection of arachnoid cysts should be considered in immunosuppressed patients in the presence of risk factors such as previous craniotomy.

Not all anosmia and fever was COVID-19 infection: a case report.

COVID-19 pandemic touch all part of world to the date more than fifteen millions of patients are infected by virus including about 1,388,926 deaths (European Centre for Disease Prevention and Control an agency of the European Union). Morocco has put in place strict containment measures to control the disease and prevent the saturation of health systems. One of the great difficulties is to quickly identify asymptomatic and paucisymptomatic cases which function as an important vector of contagion. Anosmia and fever are one of revealed mode for the young patient but is not all the case. We report one case in the sense. A 40-year-old man without medical history was admitted in the hospital after complaining 3 days ago clinical symptoms of fever, cough, headache and anosmia. Immediately, the patient benefits of COVID-19 protocol, measure of fever, nasal swab and polymerase chain reaction (PCR) test. Despite the negativity of PCR test of COVID-19, the patient was placed in isolation. Two days later, he presented a generalized seizures, then we performed a cerebral computed tomography scan (CT scan) which showed a bilateral frontal oedema. The cerebral magnetic resonance imaging (MRI) revealed the presence of 4x4x4 cm well enhanced meningeal extra axial mass of the anterior skull base with peri-tumoral oedema corresponding to an olfactory groove meningioma. The tumour was totally resected through a left fronto-lateral approach. The postoperative courses were uneventful with the persistence of totally anosmia.

The Zap-X Radiosurgical System in the Treatment of Intracranial Tumors: A Technical Case Report.

BACKGROUND AND IMPORTANCE: The Zap-X system (Zap Surgical Systems Inc, San Carlos, California) is a radically new surgical robot designed for brain and head and neck radiosurgery. It represents the first new dedicated brain stereotactic radiosurgery platform in almost half a century optimizing the goals of safety, speed, and accuracy. The Zap-X system was used in a required Chinese National Medical Products Administration clinical study. In early January 2020, 2 patients were treated with the Zap-X robot prior to a national COVID-19 lockdown. Both were closely followed via clinical exam and magnetic resonance imaging (MRI) imaging. Prospectively collected data were used to generate this report. CLINICAL PRESENTATION: Two female patients, each harboring either a trigeminal schwannoma or petroclival meningioma, were treated with the Zap-X robot. Respective tumor volumes were 2.60 and 4.02 cm3. A radiation dose of 13 Gy was prescribed to the 50% isodose line. At 8 mo of follow-up, preoperative symptoms were either resolved or stable and MRI imaging demonstrated a 31% and 56% reduction in lesion volume, respectively. In both patients, symptoms improved, and tumor volumes decreased, whereas no major complication was observed. CONCLUSION: Given only 2 patients and short-term follow-up, any conclusions about the safety and efficacy of the Zap-X radiosurgery robot are preliminary. However, in the absence of any other published outcomes to date, this small case series may be of interest to many radiosurgical specialists.