- 著者
- Hiroshi Oketani Takato Morioka Satoshi Inoha Kenji Miki Takafumi Shimogawa Nobutaka Mukae Ayumi Sakata Hiroshi Shigeto Koji Yoshimoto
- 出版者
- JAPAN EPILEPSY SOCIETY
- 雑誌
- Epilepsy & Seizure (ISSN:18825567)
- 巻号頁・発行日
- vol.15, no.1, pp.59-66, 2023 (Released:2023-09-26)
- 参考文献数
- 17
- 被引用文献数
- 1
Introduction: Arterial spin labeling (ASL) magnetic resonance (MR) perfusion imaging is useful for diagnosing non-convulsive status epilepticus (NCSE) as it visualizes ictal hyperperfusion in epileptically activated areas.Case report: A 94-year-old woman presented with inability to communicate. An electroencephalogram revealed generalized periodic discharges with triphasic morphology. However, as her liver and kidney function were normal, it was difficult to distinguish metabolic encephalopathy from NCSE. ASL showed not only diffuse hypoperfusion in the cerebral parenchyma, instead of ictal hyperperfusion, but also marked appearance of arterial transit artifact in the major arteries, probably due to stagnant flow. The patient was therefore diagnosed with hyperammonemic encephalopathy (ammonia level 128 mg/dL) induced by constipation. Along with normalization of the ammonia level, the mental status and ASL findings improved.Conclusion: In this case, ASL helped visualize the decreased blood flow and velocity secondary to hypometabolism. The addition of ASL to conventional MR images may be useful in differentiating metabolic encephalopathy from NCSE, particularly in neuroemergency situations.
- 著者
- Mariya HOKAZONO Takafumi SHIMOGAWA Akira NAKAMIZO Koji YOSHIMOTO
- 出版者
- The Japan Neurosurgical Society
- 雑誌
- NMC Case Report Journal (ISSN:21884226)
- 巻号頁・発行日
- vol.10, pp.253-257, 2023-12-31 (Released:2023-09-29)
- 参考文献数
- 36
W report the first case of hemifacial spasm (HFS) caused by vascular compression of the anterior inferior cerebellar artery (AICA) -posterior inferior cerebellar artery (PICA) common trunk anomaly at the cisternal portion of cranial nerve VII (CN VII). A 71-year-old female with a typical right HFS was admitted to our hospital. As per her magnetic resonance (MR) imaging results, no offending arteries were noted around the CN VII root exit zone (REZ). Computed tomography angiography revealed an AICA-PICA common trunk anomaly with a dominant PICA, with the rostral branch of the AICA-PICA common trunk anomaly compressing the CN VII at the cisternal portion. The patient underwent microvascular decompression (MVD), and the HFS disappeared after surgery. The amplitude of the abnormal muscle responses (AMR) disappeared immediately after complete transposition of the offending artery. However, the patient experienced mild transient facial palsy 3 days after MVD which was eventually resolved with the administration of vitamin B12. No HFS recurrence was observed during the 1-year follow-up period. The AICA-PICA common trunk anomaly has been found to cause HFS as it compressed the CN VII at the cisternal portion, and not at the REZ. AMR monitoring might be helpful for cases where the unusual vessel particularly compresses the CN VII.