Short Article
Anti-Ku antibody-positive idiopathic inflammatory myopathy: a clinical and pathological analysis of 4 cases
Chen Juan, Lin Ying, Shi Qiang
Published 2021-06-15
Cite as Chin J Neuromed, 2021, 20(6): 613-616. DOI: 10.3760/cma.j.cn115354-20210203-00081
Abstract
ObjectiveTo investigate the clinical manifestations and skeletal muscle pathological features of patients with anti-Ku antibody positive idiopathic inflammatory myopathy (IIM).
MethodsThe clinical data of 4 IIM patients with positive anti-Ku antibody, admitted to our hospital from January 1, 2019 to December 31, 2020, were retrospectively analyzed. The related literature at home and abroad were reviewed.
Results(1) The IIM patients with positive anti-Ku antibody had onset at old age in this group (41-68 years old, mean 57 years old). The features of myasthenia included the involvement of the proximal muscles of the extremities and the axial muscle groups to varying degrees. (2) The changes of inflammatory myopathy, such as atrophy and degeneration of muscle cells, infiltration of inflammatory cells between muscles and small vessels, were observed in the skeletal muscle of the patients in this group; 2 patients presented with abnormal structure of rimmed vacuoles.
ConclusionThe proximal muscles of the extremities and axial muscle groups can be involved in IIM patients with positive anti-Ku antibody, and skeletal muscle pathology can appear abnormal structure of rimmed vacuoles.
Key words:
Anti-Ku antibody; Myositis; Muscle biopsy; Pathological staining
Contributor Information
Chen Juan
Department of Neurology, First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
Lin Ying
Department of Neurology, First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China
Shi Qiang
Department of Neurology, First Medical Center of General Hospital of Chinese People's Liberation Army, Beijing 100853, China