The co‐morbidity of CIDP with SLE was rare, with fewer than 20 cases reported in literature, from which a predominance of young women, especially nephritis and hematological involvement, was observed,35 but the anti‐CNTN1 antibody positive autoimmune nodopathy with lupus nephritis has never been reported before. The gene discussed is CNTN1; the disease is systemic lupus erythematosus.