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Aneurysmal bone cyst arising from a fibrous metaphyseal defect in a toddler
In Ho Choi1, Chin Youb Chung, Tae-Joon Cho
1Department of Orthopaedic Surgery, Seoul National University, Children's Hospital and Clinical Research Institute, Seoul National University Hospital, Chongno-gu, Seoul, Republic of Korea.
Insights
A fibrous metaphyseal defect in a toddler evolved into an aneurysmal bone cyst of the proximal tibia. Regular follow-up is crucial for monitoring these pediatric bone lesions.
Area of Science:
- Pediatric Orthopedics
- Skeletal Radiology
- Pediatric Radiology
Background:
- Fibrous metaphyseal defects are common benign bone lesions in children.
- Aneurysmal bone cysts (ABCs) are expansile, blood-filled cystic lesions of bone.
- The potential evolution of fibrous metaphyseal defects into ABCs requires careful monitoring.
Observation:
- A 32-month-old girl presented with physiologic bowing and a small medial metaphyseal defect in the proximal tibia.
- Over 1 year and 3 months, this defect enlarged significantly, developing into a large aneurysmal bone cyst.
- The ABC occupied a substantial portion of the proximal tibial metaphysis.
Findings:
- The aneurysmal bone cyst arising from a fibrous metaphyseal defect was successfully treated with curettage and bone grafting.
- The lesion demonstrated complete and uneventful healing post-intervention.
- This case highlights the dynamic nature of certain pediatric bone lesions.
Implications:
- This case underscores the importance of diligent, regular follow-up for pediatric patients with fibrous metaphyseal defects.
- Early detection and monitoring can help identify potential complications like aneurysmal bone cyst formation.
- Timely intervention ensures favorable outcomes for pediatric bone abnormalities.
Abstract:
This is a case of aneurysmal bone cyst arising from a fibrous metaphyseal defect of the proximal tibia in a toddler. A 32-month-old girl presented with physiologic bowing with a small metaphyseal defect at the medial aspect of the left proximal tibia. A large aneurysmal bone cyst, occupying almost the entire metaphysis of the proximal tibia, evolved from this lesion during the following 1 year 3 months. The lesion healed uneventfully after curettage and bone grafting. This case emphasizes the importance of regular followups to observe the clinical course of a fibrous metaphyseal defect during childhood.