Malignant intracerebral nerve sheath tumor in a patient with Noonan syndrome: illustrative case.

Background: Malignant peripheral nerve sheath tumors (MPNSTs) within the neuroaxis are rare, usually arising from peripheral and cranial nerves. Even more scarce are cranial subclassifications of MPNSTs termed "malignant intracerebral nerve sheath tumors" (MINSTs). These tumors are aggressive, with a strong tendency for metastasis.

A Cohort Analysis of Truly Incidental Low-Grade Gliomas.

Background: Management of low-grade gliomas (LGGs) is controversial. Incidental LGGs are thought to represent an earlier stage in the disease process compared with symptomatic LGGs. With advanced imaging techniques, the discovery of these lesions is expected to increase, resulting in clinical need for further understanding of these tumors.

Two cases of asymptomatic Teflon granulomas following microvascular decompression mimicking cerebellopontine angle tumours: lessons learnt in the neuro-oncology multidisciplinary team.

We present the cases of two patients with asymptomatic Teflon granulomas which were incidentally found years after microvascular decompression and presented to the neuro-oncology multidisciplinary team as possible cerebellopontine angle tumours. Teflon granulomas can be asymptomatic and they can radiologically resemble cerebellopontine angle tumours. It is important that all relevant information is available to the neuro-oncology multidisciplinary team for adequate assessment and appropriate treatment recommendations.

A Tale of Two Cities: Residents' Operative Experience in the United Kingdom and Germany During the Coronavirus Disease 2019 Pandemic.

Background: The coronavirus disease 2019 (COVID-19) pandemic has had a detrimental effect on residents' operative training. Our aim was to identify the proportion of procedures performed by residents across 2 neurosurgical centers (1 in the United Kingdom and 1 in Germany) during the pandemic-affected months of March 2020-May 2020, inclusive, compared with March 2019-May 2019, inclusive.

Methods: All neurosurgical procedures performed at the United Kingdom and German institutions, between March 1, 2019 and May 31, 2019 (pre-COVID months) and March 1, 2020 and May 31, 2020 (COVID months), were extracted and operative notes evaluated.