Concurrent delayed recurrence of peripheral primitive neuroectodermal tumors in orbital and sellar/suprasellar regions in an older adult.

Background: Peripheral primitive neuroectodermal tumors (pPNETs) are rare and aggressive small round cell tumors, tending to occur in the thoracic and paravertebral soft tissues in children and young adults. This report describes an exceptionally rare case of concurrent delayed recurrence of pPNET in the orbital and sellar/suprasellar regions in an older adult, with a discussion supported by a literature review.

Case Presentation: We report an 82-year-old woman with a history of orbital pPNETs resection at age 62, followed by gamma knife radiosurgery for local recurrence at age 66.

Ultra-High-Molecular-Weight Polyethylene Merlon Shape: Novel Fixation of Artificial Bone for Cranioplasty.

Background: Cranioplasty is a surgical procedure widely performed for repairing cranial defects caused by external decompression surgery for cerebrovascular disease or traumatic brain injury. We devised a new cranioplasty method using artificial bone made up of ultra-high molecular-weight polyethylene, with serrated wings on the edge. We named this newly designed artificial bone as Merlon shape.

Fatal Cerebral Venous Thrombosis in a Pregnant Woman with Inherited Antithrombin Deficiency after BNT162b2 mRNA COVID-19 Vaccination.

Antithrombin deficiency is a high-risk factor for venous thromboembolism during pregnancy, whereas cerebral venous thrombosis is rare. Cerebral venous thrombosis related to coronavirus disease 2019 (COVID-19) vaccines has been reported; however, there are a few reports of cerebral venous thrombosis after a messenger RNA (mRNA) vaccination. A 25-year-old female in her sixth week of pregnancy presented with headache 24 days after BNT162b2 mRNA COVID-19 vaccination.

A low score on the National Institutes of Health Stroke Scale with eye movement disorder may indicate a good candidate for acute mechanical thrombectomy for posterior circulation large vessel occlusion: illustrative cases.

Background: Basilar artery occlusion (BAO) accounts for 1% of all strokes, and its natural prognosis is extremely poor. There is no consensus on the treatment strategy for mild BAO.

Observations: Between August 2015 and May 2021, 429 patients received mechanical thrombectomy (MT) in the authors' hospital.

Visual Impairment due to a large paraclinoid aneurysm treated with parent artery occlusion and bypass: A case report.

Introduction: Paraclinoid internal carotid artery (ICA) aneurysms can sometimes cause visual field disturbances due to their size, and it is challenging to treat either surgically or using endovascular techniques. Flow diverters generally have positive outcomes, but sometimes in symptomatic aneurysms, we see the thrombosed section becomes enlarged. Therefore, optimal treatment strategies are difficult to determine.