World Neurosurg
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Primary intracranial myxomas (PIMs) are extremely rare benign tumors that arise from the skull base. The aim of this study was to characterize the radiologic manifestation of PIMs in a series of 14 cases. ⋯ Radiologic findings of PIMs include calcified foci or bone debris on computed tomography, heterogeneous hypointensity on T1WI and predominantly hyperintensity on T2WI, and honeycomb appearance on enhanced T1WI.
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To study whether and when mere dorsal decompression is enough in the full endoscopic key hole technique for foraminal stenosis. ⋯ Stenosis is mainly caused by dorsal structures; mere dorsal decompression is enough. In both cases, the ventral and dorsal structures contributed to the stenosis. When there is no herniated soft fragment contributing to the stenosis, ventral decompression is not always necessary. If intraoperative exploration detects less tension formed by the ventral abnormal structures, mere dorsal decompression is enough to settle the symptoms.
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c-Met has been shown to be associated with tumor growth in several human cancers. This study aims to evaluate the correlation between the c-Met expression and histopathologic/clinical characteristics. ⋯ c-Met expression was revealed to be a useful marker for prognosis prediction in IDH-mutant lower-grade gliomas and glioblastoma, IDH-wildtype, representing a new independent prognostic marker that can be easily measured.
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Case Reports
Renal Cell Carcinoma with Primary Presentation via Metastasis to the Trigeminal Ganglion.
Renal cell carcinoma (RCC) accounts for ∼8% of all brain metastatic disease; however, spread to the cranial nerves and their ganglia is uncommon. To the best of our knowledge, we report the first case of RCC metastatic to Meckel's cave, which was diagnosed secondary to new trigeminal sensory loss. ⋯ We have reported a case of RCC presenting with numbness via metastatic spread to Meckel's cave. Although uncommon, metastasis is an important diagnostic consideration for enhancing cranial nerve lesions. Our case has demonstrated that, although a history of malignancy, multiple lesions, or systemic/constitutional symptoms are typical, rare cases can demonstrate isolated central nervous system findings. Thus, short-term radiographic surveillance is indicated if the diagnosis of an intracranial or cranial nerve mass lesion is equivocal.
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Dural arteriovenous fistulae (dAVFs) of the anatomically complex anterior condylar confluence (ACC) are often examined by computed tomography (CT) angiography and conventional angiography before treatment. Contrasted vessels often overlap with skull bones in enhanced CT scan and make it difficult to detect the shunt point of the dAVF. Bone subtraction CT angiography (BSCTA) can overcome this limitation and allow for superior imaging of dAVFs that may help to find an alternative access for catheterization. ⋯ Understanding the inherently complex and individually unique venous anatomy of the ACC is crucial for treatment of dAVFs. BSCTA is an effective visualization technique for dAVFs of the ACC and allows for precise preoperative vascular structure evaluation. We suggest that in the case of the angle between the ACV and the IJV being too sharp to catheterize vessels through the ipsilateral IJV, TVE via the intercavernous sinus can be efficiently used.