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Related Concept Videos

Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
Atypical Pneumonia01:14

Atypical Pneumonia

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 include...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:

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Related Experiment Video

Updated: Jul 18, 2026

Posterior Approach for Debridement of the Psoas Abscess
06:02

Posterior Approach for Debridement of the Psoas Abscess

Published on: March 2, 2020

[Primary psoas abscess due to Streptococcus pneumoniae].

M Alvarez Múgica1, A Jalón Monzón, R C González Alvarez

  • 1Servicio de Urología 1, Hospital Universitario Central de Asturias, Oviedo, Asturias. malvarez79@mixmail.com

Actas Urologicas Espanolas
|December 21, 2006
PubMed
Summary

This case report details a rare primary psoas abscess caused by Streptococcus pneumoniae in a 65-year-old woman. Prompt drainage and treatment led to a favorable outcome, highlighting the low mortality of this rare condition when managed effectively.

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Last Updated: Jul 18, 2026

Posterior Approach for Debridement of the Psoas Abscess
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Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
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Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
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Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria

Published on: February 23, 2014

Area of Science:

  • Infectious Diseases
  • Radiology
  • Surgical Case Reports

Background:

  • Primary psoas abscess is an uncommon condition, often presenting with non-specific symptoms like back and hip pain.
  • Prompt diagnosis and intervention are crucial for favorable patient outcomes.

Observation:

  • A 65-year-old female presented with a month of back and left hip pain.
  • Computed Tomography Angiography (CTA) revealed a retroperitoneal mass involving the left psoas muscle.
  • Drainage yielded 1800 cc of purulent fluid, identified as Streptococcus pneumoniae.

Findings:

  • Post-drainage CTA at 21 days demonstrated a significantly reduced residual collection.
  • Successful management of the primary psoas abscess was achieved through drainage and antibiotic therapy.

Implications:

  • This case underscores the importance of considering primary psoas abscess in the differential diagnosis of hip and back pain.
  • Effective management, including prompt drainage and targeted antibiotics, is associated with low mortality rates for primary psoas abscess.