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A Case of Chronic Recurrent Multifocal Osteomyelitis (CRMO)

Anjali Alamshaw1, Lori Zadoorian1, Makayla Carlson2

  • 1Pediatrics, Western University of Health Sciences, Pomona, USA.

Cureus
|November 21, 2024
PubMed

Insights

Chronic recurrent multifocal osteomyelitis (CRMO) is a rare inflammatory bone disease in children. Early recognition is crucial for timely treatment with NSAIDs or bisphosphonates.

Area of Science:

  • Pediatric Rheumatology
  • Pediatric Osteology

Background:

  • Chronic recurrent multifocal osteomyelitis (CRMO) is a rare, severe inflammatory bone condition predominantly affecting children.
  • It presents with bone pain, often in long bones, clavicles, or vertebrae, but can manifest in any bone with varied symptoms, including extraosseous manifestations.

Observation:

  • CRMO is a sterile bone disease without an infectious etiology.
  • Pathogenesis involves innate immune system dysregulation, including cytokine and inflammasome upregulation, and altered osteoclastic activity.

Findings:

  • Diagnostic methods are nonspecific, including imaging (X-ray, MRI), bone biopsy, and inflammatory/autoimmune markers.
  • CRMO is a diagnosis of exclusion, often requiring a high index of suspicion.

Implications:

  • First-line treatment involves NSAIDs; bisphosphonates are indicated for vertebral involvement.
  • This case highlights the importance of considering CRMO in the differential diagnosis of pediatric multifocal bone pain.

Keywords:
chronic recurrent multifocal osteomyelitis (crmo)chronic recurrent non-bacterial osteomyelitis (cno)osteomyelitispediatric chronic osteomyelitisrecurrent osteomyelitis

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