[Bilateral hydronephrosis and erythrocytosis].

Area of Science:

• Nephrology
• Hematology
• Renal Physiology

Background:

• Bilateral hydronephrosis is a severe condition affecting kidney function.
• Ureterolithotomy is a surgical procedure to remove stones from the ureters.
• Erythrocytosis is characterized by an abnormally high red blood cell count.

Observation:

• A 36-year-old woman presented with extreme erythrocytosis after undergoing bilateral ureterolithotomy for severe hydronephrosis.
• The patient's condition improved following the surgical intervention.

Findings:

• Hydronephrosis appears to stimulate the kidneys to produce and release erythropoietin.
• The proposed mechanism involves increased pressure within the renal pelvis causing medullary hypoxia.
• This hypoxia may be exacerbated by compromised renal blood supply, such as in cases with atherosclerosis.

Implications:

• Understanding the link between hydronephrosis and erythropoietin production is crucial for managing kidney-related blood disorders.
• This case highlights a potential mechanism for erythropoietin stimulation in obstructive uropathy.
• Further research may elucidate targeted therapies for erythrocytosis associated with renal conditions.