Ta'lim innovatsiyasi va integratsiyasi
46-son_3-to’plam_Iyun -2025
175
ISSN:3030-3621
NEPHROLYSIS PATHOPHYSIOLOGY: MECHANISMS
AND CLINICAL IMPLICATIONS
SHODIEV ULMAS MUSTAFOEVICH
Bukhara State medical Institute
Abstract
Nephrolysis is a surgical procedure involving the dissection of perinephric
adhesions surrounding the kidney, often performed to treat obstructive uropathy or
chronic flank pain caused by fibrosis. Although frequently successful, the underlying
pathophysiological mechanisms leading to the need for nephrolysis—such as chronic
inflammation, retroperitoneal fibrosis, and ischemia—are complex and multifactorial.
This article explores the biological and molecular pathways that contribute to
perinephric adhesion formation and reviews the clinical consequences and outcomes
of nephrolysis.
1. Introduction
Nephrolysis, or surgical liberation of the kidney, is indicated in cases where the
renal capsule is entrapped by fibrous tissue, often resulting in impaired mobility, pain,
or ureteral obstruction. This condition is commonly secondary to chronic inflammatory
processes such as retroperitoneal fibrosis (RPF), prior surgeries, infections, or radiation
therapy. The pathogenesis involves immune-mediated fibroinflammatory responses
leading to the formation of dense adhesions around the kidney.
2. Pathophysiological Mechanisms
2.1 Inflammation and Fibrosis
Chronic perinephric inflammation induces fibroblast activation and collagen
deposition. Transforming Growth Factor-beta (TGF-β) plays a central role by
promoting
fibroblast-to-myofibroblast
differentiation,
leading
to
excessive
extracellular matrix (ECM) production. In RPF, CD4+ T-cells and macrophages
infiltrate the retroperitoneal space, releasing cytokines such as IL-6 and TNF-α,
exacerbating fibrosis.
2.2 Hypoxia and Ischemia
Encapsulating fibrous tissue may impair renal perfusion, creating a hypoxic
environment. Hypoxia-inducible factors (HIFs) further stimulate profibrotic pathways
and contribute to a cycle of inflammation, fibrosis, and tissue remodeling.
2.3 Autoimmune Contributions
Ta'lim innovatsiyasi va integratsiyasi
46-son_3-to’plam_Iyun -2025
176
ISSN:3030-3621
In idiopathic retroperitoneal fibrosis, autoantidiv production and systemic
IgG4-related disease have been implicated. These cases often show systemic
involvement, including aortitis, pancreatitis, and sialadenitis.
3. Clinical Manifestations and Indications for Nephrolysis
Patients with fibrotic entrapment of the kidney may present with:
Chronic unilateral or bilateral flank pain
Obstructive uropathy (hydronephrosis)
Diminished renal function
Systemic symptoms in autoimmune-related cases
Nephrolysis is performed either via open, laparoscopic, or robotic-assisted
approach. The goal is to restore kidney mobility and relieve ureteral compression
without nephrectomy.
4. Histopathological Findings
Histological examination typically reveals:
Dense collagen-rich fibrous tissue
Chronic inflammatory infiltrates (lymphocytes, plasma cells)
Neovascularization
In IgG4-related cases: storiform fibrosis and IgG4-positive plasma cells
5. Clinical Outcomes and Prognosis
Surgical nephrolysis often results in symptom relief and restoration of renal
drainage. However, recurrence of fibrosis or adhesions is possible, particularly in
untreated systemic inflammatory disorders. Adjunctive treatment with corticosteroids
or immunosuppressants may be warranted in autoimmune or IgG4-related cases.
6. Conclusion
Understanding the pathophysiological underpinnings of perinephric fibrosis is
crucial for the effective management of patients undergoing nephrolysis. Early
diagnosis, histological confirmation, and tailored surgical and pharmacological
interventions are key to favorable outcomes.
References
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