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[Myositis ossificans circumscripta in the axilla].
J L Alonso Calderón1, J Delgado Valdueza, I Deprada Vicente
1Servicio de Cirurgía Pediátrica, Hospital Infantil Universitario del Niño Jesús, Madrid, Spain. cirped@hnjs.insalud.es
Anales De Pediatria (Barcelona, Spain : 2003)
|March 23, 2004
Summary
Myositis ossificans circumscripta (MOC), a rare bone disorder, can occur in children. Histopathology is key for diagnosing MOC, distinguishing it from cancers.
Area of Science:
- Orthopedics
- Pediatric Radiology
- Pathology
Background:
- Myositis ossificans circumscripta (MOC) is a rare benign condition involving heterotopic bone formation.
- It is infrequently diagnosed in pediatric patients and typically affects extremities.
Observation:
- A 15-year-old female presented with nontraumatic MOC in the axilla.
- Initial imaging (radiography, ultrasound) was inconclusive and could not exclude malignancy.
Findings:
- Incisional biopsy and histopathological examination confirmed the diagnosis of MOC.
- Magnetic resonance imaging is suggested as a potential primary diagnostic tool to avoid biopsies.
Implications:
- Accurate diagnosis of MOC is crucial, requiring differentiation from malignant sarcomas and fibrodysplasia ossificans progressiva.
- Despite diagnostic challenges, MOC generally has a favorable prognosis in childhood.