Focal segmental glomerulosclerosis associated with essential thrombocythemia

Area of Science:

• Nephrology
• Hematology
• Pathology

Background:

• Focal segmental glomerulosclerosis (FSGS) is a leading cause of kidney disease characterized by proteinuria and renal function decline.
• Secondary FSGS can arise from various conditions, but its association with essential thrombocythemia (ET) is rarely documented.
• Essential thrombocythemia (ET) is a myeloproliferative neoplasm marked by elevated platelet counts.

Observation:

• A 76-year-old male presented with nephrotic syndrome and hepatosplenomegaly.
• The patient had a history of splenectomy and subsequently developed thrombocythemia.
• Renal biopsy confirmed FSGS, and bone marrow examination revealed ET.

Findings:

• The case highlights a rare occurrence of FSGS in a patient with ET and thrombocytosis post-splenectomy.
• Elevated serum levels of transforming growth factor-beta (TGF-β), basic fibroblast growth factor (bFGF), and platelet-derived growth factor (PDGF)-BB were observed.
• These growth factors are implicated in kidney damage and may play a role in the pathogenesis of FSGS in this context.

Implications:

• This case suggests a potential pathogenic link between ET, thrombocytosis post-splenectomy, and the development of FSGS.
• Further research into the role of specific growth factors (TGF-β, bFGF, PDGF-BB) in ET-associated FSGS is warranted.
• Understanding this association may lead to novel diagnostic or therapeutic strategies for patients with both conditions.