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Anti-signal Recognition Particle Antibody-positive Immune-mediated Myopathy after mRNA-1273 SARS-CoV-2 Vaccination
Intern Med. 2022 Sep 13. doi: 10.2169/internalmedicine.0404-22. Online ahead of print.ABSTRACTA 26-year-old Japanese woman developed a fever, myalgia and gait disturbance one day after receiving the second dose of the mRNA-1273 severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine. A neurological examination revealed symmetrical weakness and myalgia in proximal lower limbs, and a blood examination showed prominent elevation of creatinine kinase. Magnetic resonance imaging (MRI) revealed a high signal intensity in the thigh muscles on short-tau inversion recovery images, and antibody testing revealed positive...
Source: Internal Medicine - September 14, 2022 Category: Internal Medicine Authors: Masanobu Tanemoto Ryosuke Oda Yuichiro Toyama Hirohiko Shizukawa Kazuki Yokokawa Taro Saito Syuuichirou Suzuki Akihiro Matsumura Shin Hisahara Source Type: research

Case of Anti–Single Recognition Particle–Mediated Necrotizing Myopathy After Influenza Vaccination
We reported a 28-year-old healthy woman presented with subacute onset ascending muscle weakness 2 weeks after an annual influenza vaccination. Cerebral Spinal Fluid study showed normal cell counts with elevated protein and nerve conduction study showed reduced diffuse compound muscle action potential amplitudes suggesting a diagnosis of Guillain–Barré syndrome. Despite treatment using intravenous immunoglobulin, her condition continued to get worse with new bulbar and respiratory muscle weakness. Eventually, the diagnosis of anti–single recognition particle–mediated necrotizing myopathy was made based on elevated cr...
Source: Journal of Clinical Neuromuscular Disease - May 26, 2018 Category: Neurology Tags: Case Review Source Type: research