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Updated: Aug 29, 2026

Posterior Approach for Debridement of the Psoas Abscess
Published on: March 2, 2020
Ilio-psoas abscess caused by methicillin-resistant Staphylococcus aureus (MRSA): a rare but potentially dangerous
Yasuhiro Okada1, Atsuyuki Yamataka, Yuki Ogasawara
1Department of Paediatric Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, 113-8421, Tokyo, Japan.
Abstract:
We report a case of methicillin-resistant Staphylococcus aureus ilio-psoas abscess (IPA) in a neonate. This case has clinical importance because this neonate had toxic shock syndrome-like exanthematous disease, known as NTED, before developing IPA. A high index of suspicion is required for IPA if a neonate presents with limb disuse and fever of unknown origin. Our case required surgical drainage, since ultrasound-guided percutaneous needle aspiration failed.
Insights
Methicillin-resistant Staphylococcus aureus (MRSA) can cause ilio-psoas abscess (IPA) in neonates, sometimes preceded by a toxic shock syndrome-like exanthematous disease (NTED). Early suspicion and surgical drainage are vital for neonates with unexplained fever and limb disuse.
Area of Science:
- Neonatal infectious diseases
- Pediatric surgery
- Critical care medicine
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) is a significant pathogen in neonatal infections.
- Ilio-psoas abscess (IPA) is a rare but serious condition in neonates.
- Neonatal toxic shock syndrome-like exanthematous disease (NTED) is an uncommon presentation.
Observation:
- A neonate presented with symptoms suggestive of NTED.
- The neonate subsequently developed an IPA.
- Ultrasound-guided percutaneous needle aspiration was unsuccessful in draining the abscess.
Findings:
- The IPA was confirmed to be caused by MRSA.
- Surgical drainage was required for successful management of the IPA.
- The clinical course highlights a potential progression from NTED to IPA.
Implications:
- Clinicians should maintain a high index of suspicion for IPA in neonates presenting with unexplained fever and limb disuse.
- Prompt diagnosis and appropriate management, including surgical intervention when necessary, are crucial for favorable outcomes.
- This case underscores the importance of considering invasive MRSA infections in neonates with atypical presentations.
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