World Neurosurg
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Lesions of the skull make up a small but important part of neurosurgical practice. Several systemic disorders may involve the cranial vault including neoplastic and non-neoplastic conditions. Sarcoidosis of the skull is a little-known cause of calvarial involvement that has been rarely reported in the literature. The available information about skull sarcoidosis (SS) is sparse and is not well described; for this reason, we consider that a detailed description of this uncommon condition is necessary. ⋯ The information collected from this review shows that SS is a rare condition that frequently is observed in patients without previous diagnosis of sarcoidosis. SS may manifest in different ways, and even may be found incidentally in some patients. The diagnosis of SS should be considered when multiple lytic skull lesions are observed, especially in cases of patients without a previous history of malignancy.
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Review Case Reports
Primary Orbital Dedifferentiated Liposarcoma: A Case Report.
Primary dedifferentiated liposarcoma of the orbit is a rare condition. ⋯ Primary orbital dedifferentiated liposarcomas remain challenging for their diagnosis and standard treatment. Clinicians should keep in mind the possibility of liposarcoma with orbital tumors.
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Stereotactic localization of neurosurgical targets traditionally relies on computed tomography (CT), which is considered the optimal imaging modality for geometric accuracy. However, in-depth investigations that characterize the precision and accuracy of CT images are lacking. We used a CT phantom to examine interscanner precision and interprotocol accuracy in coordinate localization. ⋯ We found evidence of clinically relevant inconsistency between 2 CT scanners used for stereotactic localization. SS image acquisition was superior to helical scanning with respect to localization accuracy. Interscanner consistency cannot be assumed. Institutions would benefit from identifying the errors inherent in their CT scanners.
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Two main techniques for endovascular treatment of patients with acute ischemic stroke are direct aspiration and stent retriever thrombectomy. We hypothesized that the direct aspiration approach would be less costly than the stent retriever approach. ⋯ Costs of endovascular treatment using a direct aspiration-first pass approach are less than with a stent retriever first pass approach.