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Renal involvement in POEMS syndrome
A Modesto-Segonds1, J P Rey, C Orfila
1Laboratoire d'Immunologie, CHU Rangueil, Toulouse, France.
Clinical Nephrology
|May 1, 1995
Summary
POEMS syndrome can cause kidney problems, often presenting as acute renal failure or mild chronic kidney disease. Renal biopsies reveal unique "mesangiolytic glomerulonephritis" distinct from other kidney diseases.
Area of Science:
- Nephrology
- Hematology
- Pathology
Background:
- POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, skin changes) is a rare multisystem disorder.
- Renal involvement in POEMS syndrome is uncommon, with only 17 previously reported cases, mostly from Japan.
Observation:
- This study details a patient with POEMS syndrome and unique renal pathological findings.
- Clinical presentations of renal involvement range from acute renal failure with anasarca to chronic renal insufficiency with mild proteinuria.
- Distinct glomerular changes on renal biopsy, termed 'mesangiolytic glomerulonephritis', were observed, differing from MPGN and TMA.
Findings:
- Renal biopsies showed mesangial proliferation and capillary wall thickening, mimicking MPGN.
- Immunofluorescence microscopy revealed no immunoglobulin or complement deposits.
- Electron microscopy showed lucent subendothelial spaces, suggesting microangiopathic lesions without thrombi or arteriolar changes.
Implications:
- The findings suggest chronic injury to glomerular endothelial cells as the cause of microangiopathic lesions in POEMS syndrome.
- Increased IL-6 production may explain the efficacy of corticosteroid therapy, especially in acute cases.
- This research highlights the importance of recognizing specific renal pathology in POEMS syndrome for appropriate management.