Publications by authors named "O Hirai"
Article Synopsis
- Cerebral venous sinus thrombosis (CVST) leads to increased pressure and potential neurological issues due to vein blockage, making early treatment essential for better outcomes.
- The standard treatment involves anticoagulants, primarily intravenous heparin followed by oral medications, with evidence suggesting that direct oral anticoagulants (DOACs) might also be effective and safer.
- A case study is presented where a patient with CVST and worsening neurological symptoms was successfully treated by transitioning from heparin to oral Edoxaban early on, resulting in prompt recanalization of the affected sinus.
Article Synopsis
- * The patient was diagnosed with a dAVF that had complex drainage issues, and an emergency embolization was performed to alleviate her symptoms.
- * Despite a successful reduction in the dAVF post-treatment, the patient experienced a significant cerebral hemorrhage immediately afterward, highlighting the need for careful evaluation of hemodynamics before such procedures.
Article Synopsis
- Pineal parenchymal tumor of intermediate differentiation (PPTID) is a rare type of brain tumor classified by the WHO in 2000, sitting between pineocytoma and pineoblastoma in terms of prognosis and having uncertain management strategies.
- A case study describes a 63-year-old woman who experienced lower-extremity weakness, leading to the discovery of a pineal mass, which was diagnosed as a pineocytoma after surgical resection.
- After two years without treatment following surgery, the patient faced tumor recurrence and leptomeningeal dissemination, which was successfully treated with craniospinal irradiation, highlighting the need for long-term monitoring in PPT patients.
Background: The relative apparent diffusion coefficient (ADC) ratio can be used to evaluate the extent of ischemia. We investigated the risk factors for, and correlation between, relative ADC ratio and hemorrhagic transformation (HT) after thrombolysis.
Methods: This single-center, retrospective study involved 105 patients with acute occlusion of the anterior circulation.
Article Synopsis
- - The study examines the use of the relative apparent diffusion coefficient (ADC) ratio in MRI to assess ischemia and predict the potential for ischemic reversal and the risk of hemorrhage after treatment in patients with acute artery occlusion.
- - An analysis of 56 patients showed that higher ADC ratios were associated with reversible lesions, whereas lower ratios were linked to final infarct lesions, with notable differences in ADC readings between hemorrhagic and non-hemorrhagic regions.
- - Findings suggest that the relative ADC ratio can effectively indicate the likelihood of tissue recovery post-revascularization and help predict complications, regardless of when the ischemic event occurred.