Related Experiment Video
Updated: Jun 12, 2026

Posterior Approach for Debridement of the Psoas Abscess
Published on: March 2, 2020
[Psoas abscess as a chicken pox complication]
Jorge E Larcamon1, Gabriela Juanco, Lionel A Alvarez
1Servicio de Pediatría, HIGA Luisa C. de Gandulfo. jlarcamon@hotmail.com
Abstract:
Chicken pox is the most frequent exantematic illness; usually its course is self-limited and benign. Several bacterial complications are described due to the disruption of the skin as a defensive barrier because of the characteristics of the injuries and the associated inmunodepression. Psoas abscess is a rare illness and it's difficult to diagnose, with a general unspecified clinical presentation. We present the case of a 5-year-old girl, on her fifth day of chicken pox, who consults about a febrile convulsion, from which she recovers without any neurological symptoms, referring to functional impotence of her inferior left limb and pain in the lumbar and gluteal zone, which irradiates to the homolateral hip, making deambulation impossible. The definitive diagnosis was made with a CAT at hospital admission. The germ isolated was community-acquired methricillin-resistant Staphilococcus aureus. Treatment consisted in surgical drainage and endovenous antibiotics.
Insights
Chicken pox can lead to rare bacterial infections like psoas abscess. This case highlights a difficult-to-diagnose complication in a child with community-acquired methicillin-resistant Staphylococcus aureus.
Area of Science:
- Pediatrics
- Infectious Diseases
- Surgical Pathology
Background:
- Chicken pox (varicella) is a common viral illness, typically benign and self-limiting.
- Bacterial superinfections can occur due to skin barrier disruption and associated immunosuppression.
- Psoas abscess is an uncommon and diagnostically challenging condition with vague symptoms.
Observation:
- A 5-year-old girl presented with fever, seizure, and subsequent left leg immobility and pain after chicken pox.
- Clinical presentation included lumbar, gluteal, and hip pain, preventing ambulation.
- Computed Axial Tomography (CAT) scan confirmed the diagnosis upon hospital admission.
Findings:
- The causative agent identified was community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA).
- The patient experienced a febrile convulsion but recovered neurologically.
- The diagnosis of psoas abscess was established via CAT scan.
Implications:
- This case underscores the importance of considering rare bacterial complications following varicella infection.
- Early diagnosis and appropriate management, including surgical drainage and antibiotics, are crucial for favorable outcomes.
- Highlights the potential for CA-MRSA to cause deep-seated infections in pediatric patients.
Related Concept Videos
Chickenpox
Smallpox
Pneumonia III: Complications and Assessment
Atypical Pneumonia
Brain Abscess l: Introduction
Pneumonia I: Introduction
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...