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A case of membranous nephropathy complicated by autoimmune hepatitis and primary biliary cholangitis
Xiwen Lei1, Rui Dong2, Jing Sun2
1Department of Pathology, The PLA Naval Medical University, Shanghai Changhai Hospital, Shanghai, China.
Rationale:
Membranous nephropathy (MN) is an important and common cause of nephrotic syndrome in adults. Overlap syndrome is an infrequent clinical subgroup characterized by the coexistence of autoimmune hepatitis, primary biliary cholangitis or primary sclerosing cholangitis. Coexistence of MN and autoimmune liver diseases is rare. Several reports have documented the concurrent presence of multiple autoimmune diseases, suggesting a potential mechanism linking these disorders.
Patients Concerns:
A 53-year-old male patient diagnosed with phospholipase A2 receptor-related MN accompanied by recurrent increases in aminotransferases during treatment.
Diagnoses:
The patient was finally diagnosed as MN with primary biliary cholangitis-autoimmune hepatitis overlap syndrome based on histopathological findings.
Interventions:
A combination of rituximab, oral methylprednisolone, and ursodeoxycholic acid.
Outcomes:
The patient achieved complete immunological remission and partial remission of proteinuria.
Lessons:
We encountered a unique case with autoimmune disease of both liver and kidney. Treatment plans should be tailored to each patient's specific condition since there is no standard protocol. The pathological mechanisms of overlapping autoimmune diseases require further understanding.
Insights
This case study highlights a rare overlap syndrome of membranous nephropathy and autoimmune liver disease. Treatment involved a combination of immunosuppressants and ursodeoxycholic acid, leading to remission.
Area of Science:
- Nephrology
- Hepatology
- Immunology
Background:
- Membranous nephropathy (MN) is a frequent cause of nephrotic syndrome in adults.
- Overlap syndrome, characterized by co-existing autoimmune liver diseases, is rare.
- Concurrent autoimmune liver and kidney diseases are exceptionally uncommon, suggesting shared autoimmune pathways.
Purpose of the Study:
- To report a unique case of phospholipase A2 receptor-related MN with primary biliary cholangitis-autoimmune hepatitis overlap syndrome.
- To describe the diagnostic and therapeutic approach in this rare clinical presentation.
Main Methods:
- A 53-year-old male patient with MN and elevated liver enzymes was investigated.
- Diagnosis was confirmed via histopathology, revealing MN and overlap syndrome.
- Treatment included rituximab, methylprednisolone, and ursodeoxycholic acid.
Main Results:
- The patient achieved complete immunological remission.
- Partial remission of proteinuria was observed.
- The combined therapy demonstrated efficacy in managing this complex autoimmune condition.
Conclusions:
- This case underscores the importance of considering co-existing autoimmune conditions affecting both liver and kidney.
- Tailored treatment strategies are crucial due to the lack of standardized protocols for such rare overlap syndromes.
- Further research is needed to elucidate the underlying pathological mechanisms of overlapping autoimmune diseases.
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