To explore the immunological links between autoimmune nodopathy (AN), Sjögren’s disease, and nephrotic syndrome, and to identify diagnostic clues for AN, emphasizing the significance of this rare comorbidity.
Key Findings:
The patient tested positive for anti-CNTN1 antibodies and exhibited symptoms of Sjögren’s disease and nephrotic syndrome, confirmed by specific diagnostic tests.
Intravenous methylprednisolone therapy led to significant improvement in neurological symptoms.
Key diagnostic clues include massive proteinuria, postural tremor, and poor response to intravenous immunoglobulin.
Interpretation:
Anti-CNTN1 antibodies may mediate immune injury to both peripheral nerves and kidneys, highlighting the need for awareness of this rare comorbidity in clinical practice and its implications for treatment.
Limitations:
The study is based on a single case report, limiting generalizability.
Further research is needed to establish broader immunological connections and include diverse case studies.
Conclusion:
Clinicians should be vigilant for signs of AN in patients with Sjögren’s disease and nephrotic syndrome to facilitate early diagnosis and treatment, ultimately improving patient outcomes.
