Related Experiment Video
Updated: Jun 14, 2025
Diagnosis and Surgical Treatment of Human Brucellar Spondylodiscitis
Published on: May 23, 2021
Clinical features of juvenile onset ankylosing spondylitis in Japanese patients
Kenji Kishimoto1,2, Shuji Asai1, Mochihito Suzuki1
1Department of Orthopedic Surgery and Rheumatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Objectives:
This retrospective study aimed to examine the clinical features of juvenile onset ankylosing spondylitis (JoAS) in Japanese patients.
Methods:
We examined clinical symptoms (including initial symptoms) and the progression to diagnosis of AS in 17 Japanese JoAS patients at Nagoya university hospital between January 2004 and May 2023. Initial symptoms considered were pain at axial joints and/or extra-axial joints.
Results:
Mean ages (± standard deviation) at onset and diagnosis of AS were 12.9 (± 2.0) and 19.6 (± 9.6) years, respectively. The back was the most common site of initial symptoms (7 patients; 41.2%), followed by the hip (5 patients; 29.4%) and knees (5 patients; 29.4%). Initial symptoms were limited to extra-axial joints and axial joints in 9 (52.9%) and 7 (41.2%) patients, respectively. Nine patients (52.9%) were recognised as a musculoskeletal disease other than AS, such as oligoarticular juvenile idiopathic arthritis.
Conclusions:
Sites of initial symptoms frequently were the back, hip, and knees, with 52.9% of patients having initial symptoms limited to extra-axial joints. More than half of the patients recognised musculoskeletal diseases other than AS.
Related Concept Videos
01:30Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
01:29Autoimmune Disorders
Concept and Mechanism of Autoimmune Diseases
The immune...
01:20COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
01:30Inflammatory Bowel Disease II: Crohn's Disease
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by...
01:20The JAK-STAT Signaling Pathway
01:24Asthma-III: Symptoms and Complications
Classification of Asthma