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Related Concept Videos

Acute Pyelonephritis I: Introduction01:27

Acute Pyelonephritis I: Introduction

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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...
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Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

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Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...
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Appendicitis-I: Introduction01:22

Appendicitis-I: Introduction

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The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
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Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Urinary Tract Infection I: Introduction01:26

Urinary Tract Infection I: Introduction

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Urinary tract infections (UTIs) impact various parts of the urinary system, including the kidneys, ureters, bladder, and urethra. These infections are generally bacterial, with Escherichia coli being the most common causative agent, often originating from the gastrointestinal tract. However, other bacteria, such as Staphylococcus saprophyticus, Klebsiella pneumoniae, and Proteus mirabilis, are also known to cause UTIs. The type, location, and underlying complexity of the UTI guide both...
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Atypical Pneumonia01:14

Atypical Pneumonia

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Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease...
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Updated: Apr 24, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis
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Obturator externus pyomyositis.

Timothy Slade1, Robert Hawkes, Guy Atherton

  • 1From the Departments of *Emergency Medicine, †Radiology, and ‡Orthopaedic Surgery, Bristol Royal Hospital for Children, Bristol, United Kingdom.

Pediatric Emergency Care
|September 5, 2014
PubMed
Summary

Obturator externus pyomyositis is a rare cause of childhood hip pain and limp. Magnetic resonance imaging is crucial for diagnosing this condition, aiding prompt treatment.

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Posterior Approach for Debridement of the Psoas Abscess
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Area of Science:

  • Pediatric Orthopedics
  • Infectious Diseases

Background:

  • Pyomyositis, a bacterial infection of muscle, is uncommon in the obturator externus.
  • The etiology is often unclear, possibly involving transient bacteremia and muscle vulnerability.

Observation:

  • This case report details a child presenting with symptoms of limp and hip pain.
  • The diagnostic journey from initial presentation to definitive diagnosis is outlined.

Findings:

  • Magnetic resonance imaging (MRI) proved essential in confirming the diagnosis of obturator externus pyomyositis.
  • The study highlights the diagnostic utility of MRI in similar pediatric cases.

Implications:

  • Early and accurate diagnosis of obturator externus pyomyositis is critical for effective management.
  • Increased awareness and utilization of MRI can improve outcomes for children with this rare condition.