Related Experiment Video
Updated: May 9, 2026

Ileectomy-induced Bile Overaccumulation in Mouse Intestine
Published on: August 21, 2017
Case Report: Reversible chorea arising from severe vitamin B12 deficiency due to autoimmune gastritis: a
Meifang Yang1,2,3, Yifan Geng1,2,3, Zhiren Chen3
1Department of Neurology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou, Jiangsu, China.
Abstract:
Cognitive impairment, ocular neuropathy, sensorimotor polyneuropathy, and subacute combined spinal cord degeneration can all result from a common illness called vitamin B12 insufficiency. With regard to extrapyramidal movement disorders, it is rare, frequently misdiagnosed, and under recognized, which postpones timely treatment. A case study of a 66-year-old man with acute-onset and reversible choreoathetoid symptoms is presented in this publication. A significant vitamin B12 deficiency and an abnormal hypermetabolism in the basal ganglia region were detected by 18F-FDG PET/CT. Remarkably, the patient's dyskinesia disappeared as soon as vitamin B12 replacement therapy was administered. The patient's etiology was identified as a mix of vitamin B12 malabsorption and inadequate intake from autoimmune-related gastritis. In order to achieve the best potential therapeutic results, this case highlights the importance of timely and correct diagnosis, timely treatment of vitamin B12 deficiency based on its underlying etiology, and careful research of multiple etiologies.
More Related Videos
Related Concept Videos
Myasthenia Gravis: Overview and Treatment
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
Vitamins
Gastritis-II: Pathophysiology
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
Graves' Disease I: Introduction
Gastritis II: Pathophysiology
Chronic Pancreatitis II: Pathophysiology

