98%
921
2 minutes
20
We herein report a case of myoclonic epilepsy with ragged-red fibers (MERRF) harboring a novel variant in mitochondrial cysteine transfer RNA (MT-TC). A 68-year-old woman presented with progressive myoclonic epilepsy with optic atrophy and peripheral neuropathy. A skin biopsy revealed p62-positive intranuclear inclusions. No mutations were found in the causative genes for diseases known to be related to intranuclear inclusions; however, a novel variant in MT-TC was found. The association between intranuclear inclusions and this newly identified MERRF-associated variant is unclear; however, the rare complication of intranuclear inclusions in a patient with typical MERRF symptoms should be noted for future studies.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8907771 | PMC |
http://dx.doi.org/10.2169/internalmedicine.7767-21 | DOI Listing |
Exp Anim
September 2025
Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University.
In 2016, an outbreak of Rattus norvegicus polyomavirus 2 (RatPyV2) infection was reported in a colony of X-linked severe combined immunodeficiency (XSCID) rats in the United States. While RatPyV2 infection persists asymptomatically in immunocompetent rats, immunodeficient XSCID rats develop variable respiratory symptoms, emaciation, impaired breeding performance, and systemic deteriorating condition. RatPyV2 is an epitheliotropic virus targeting epithelial cells of the salivary glands, Harderian glands, extraorbital lacrimal glands, respiratory system, and reproductive or accessory reproductive organs.
View Article and Find Full Text PDFSci Rep
September 2025
Department of Pathology, Key Laboratory of Transplant Engineering and Immunology, West China Hospital, Institute of Clinical Pathology, Sichuan University, Chengdu, 610041, Sichuan, China.
This study presents an interpretable AI-assisted diagnostic approach for papillary thyroid carcinoma (PTC) cytopathology by combining graph neural networks (GNNs) with knowledge graphs (KGs). Routine cytology smears from 281 PTC cases were scanned, labeled, and processed using the Cascade RCNN model to detect pathological cell features, including 45,680 ground-glass nuclei, 712 nuclear grooves, and 116 intranuclear inclusions. By integrating GNNs, the model achieved a mean intersection over union (mIoU) of 56.
View Article and Find Full Text PDFIntroduction: Neuronal intranuclear inclusion disease (NIID) is a rare neurodegenerative disorder. Hyperintense signals on diffusion-weighted imaging (DWI) at the corticomedullary junction are key diagnostic features. Early manifestations are often overlooked, leading to misdiagnoses.
View Article and Find Full Text PDFJ Stroke Cerebrovasc Dis
October 2025
Neurology Department, First Affiliated Hospital of Gannan Medical University, No 128 Jinling Road, Jingkai District, Ganzhou 341000, Jiangxi Province, China. Electronic address:
Background: Neuronal intranuclear inclusion disease (NIID) is a rare neurodegenerative disorder with no prior reports linking it to acute large-vessel cerebral infarction.
Methods: A 65-year-old man with progressive limb numbness and acute neuropsychiatric symptoms underwent MRI, skin biopsy, and genetic testing.
Results: MRI revealed corticomedullary "ribbon signs" and right middle cerebral artery (MCA) stenosis.
Intracellular inclusions are singular structures that may occur secondary to viral infection, cytoplasmic invagination, and organelle entrapment, or due to abnormal accumulation of biological material, such as proteins. Determining the exact nature of an inclusion is crucial in diagnostic pathology, especially in the context of colony management and toxicity studies. In this case series, we identified pancreatic islet intranuclear (IN) and intracytoplasmic (IC) eosinophilic inclusions in 13 out of 21 southern giant pouched rats (), a species studied for its outstanding olfactory capacities.
View Article and Find Full Text PDF