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Acute Pyelonephritis I: Introduction

Acute Pyelonephritis I: Introduction

Pyelonephritis is a bacterial infection that primarily affects the renal parenchyma and collecting system, including the renal pelvis, tubules, and interstitial tissue of one or both kidneys. It can be classified as either acute—a sudden, severe infection—or chronic, which refers to long-term or recurrent kidney infections.The primary cause of acute pyelonephritis (APN) is bacterial infection, with Escherichia coli accounting for approximately 70-80% of cases. Other bacteria, such as Proteus,...

Acute Kidney Injury II: Pathophysiology

Acute Kidney Injury II: Pathophysiology

Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...

Disorders of the Urinary System

Disorders of the Urinary System

The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
Urinary tract infections (UTIs) are one of the most common urinary system disorders. They are caused by bacteria that enter the urethra and can spread to the bladder resulting in cystitis. Pyelonephritis is the result of a UTI that has ascended to the level of the...

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of fluid...

Urinary Tract Calculi V: Nursing Management

Urinary Tract Calculi V: Nursing Management

AssessmentSubjective Data: Obtain a detailed health history, including any recent or chronic urinary tract infections, periods of immobilization, previous episodes of renal calculi, and medical conditions such as gout, benign prostatic hyperplasia, or hyperparathyroidism. Review the medication history for drugs that may influence stone formation, including allopurinol, analgesics, loop diuretics, or thiazide diuretics. Document the use of long-term indwelling catheters and any past surgical...

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Related Experiment Video

Updated: Jun 14, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis

Published on: July 8, 2025

Hydronephrosis caused by ureterosciatic herniation.

Huan-Lun Hsu¹, Kuo-How Huang, Chin-Chen Chang

¹Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan.

|March 31, 2010

Summary

This summary is machine-generated.

A rare case of ureterosciatic herniation causing left flank pain and hydronephrosis was successfully treated with ureteral stent placement. This intervention relieved symptoms and prevented recurrence in a patient with prior incontinence surgery.

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Last Updated: Jun 14, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis

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Published on: July 8, 2025

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Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

Area of Science:

Urology
Medical Imaging
Surgical Complications

Background:

Stress urinary incontinence surgery can rarely lead to complications.
Ureterosciatic herniation is an uncommon cause of urinary tract obstruction.

Observation:

A 69-year-old woman presented with left flank pain post-urinary incontinence surgery.
Physical exam revealed costovertebral angle tenderness; imaging showed left hydronephrosis.
Computed tomography scan identified ureterosciatic herniation as the cause.

Findings:

Antegrade placement of an indwelling ureteral stent successfully treated the ureterosciatic herniation.
The double J catheter removal after 3 months resulted in complete symptom resolution.

Implications:

This case highlights the importance of considering rare anatomical complications after pelvic surgery.
Ureteral stenting offers an effective minimally invasive treatment for ureterosciatic herniation.
Early diagnosis and intervention can prevent long-term renal damage from urinary obstruction.