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Updated: Jun 6, 2026

Posterior Approach for Debridement of the Psoas Abscess
Published on: March 2, 2020
Psoas abscess with associated septic arthritis of the hip in infants
Enbo Wang1, Lili Ma, Eric W Edmonds
1Department of Pediatric Orthopaedics, Shengjing Hospital, China Medical University, Shenyang, 110004, China.
Insights
Concurrent psoas abscess and septic hip arthritis in infants are rare. Early diagnosis and treatment are crucial to prevent long-term hip deformity, with MRI aiding identification.
Area of Science:
- Pediatric Infectious Diseases
- Pediatric Orthopedics
- Medical Imaging
Background:
- Psoas abscess and septic hip arthritis are serious infections in infants.
- Concurrent presentation is exceptionally rare, particularly in early infancy.
- Delayed diagnosis can lead to severe complications and long-term sequelae.
Observation:
- Two cases of concurrent psoas abscess and septic hip arthritis in infants aged 3 and 7 months are presented.
- Common clinical signs included inguinal mass, irritable hip, and delayed treatment.
- One infant experienced a delayed diagnosis of septic hip arthritis.
Findings:
- Both infants developed residual hip deformity following treatment.
- The concurrent pathology is hypothesized to result from infectious spread due to delayed diagnosis.
- This study reports the first known cases of this dual infection in infancy.
Implications:
- Magnetic resonance imaging (MRI) is a valuable tool for diagnosing these concurrent conditions.
- Prompt recognition and management are essential to improve outcomes in infants.
- Understanding the proposed etiologic mechanism may guide future diagnostic and therapeutic strategies.
Abstract:
We describe psoas abscess with concomitant septic hip arthritis in 2 infants, 3 and 7 months old. The common clinical features were a palpable mass in the inguinal region, irritable hip, and delayed treatment. The diagnosis of septic hip was delayed in one child, and they both had residual hip deformity at follow-up. It is possible that initial delay in diagnoses resulted in the concurrent pathologic condition because of spread of infection. These 2 cases demonstrate the first known reports of concurrent psoas abscess and septic hip arthritis in infancy. Magnetic resonance imaging is a valuable method to identify these concurrent pathologic conditions. A proposed etiologic mechanism is also discussed in the article.
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