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Published on: December 3, 2016
Metaphyseal and diaphyseal chondroblastomas
Aditya V Maheshwari1, James S Jelinek, Albert J Song
1Department of Orthopaedics and Rehabilitation, State University of New York Downstate Medical Center, 450 Clarkson Avenue-Box 30, Brooklyn, NY 11203, USA. adityavikramm@gmail.com
Skeletal Radiology
|July 21, 2011
Summary
Pure metaphyseal or diaphyseal chondroblastomas (CB) are rare bone tumors. Recognizing their distinct radiological features, such as marginal sclerosis and periosteal reaction, aids in diagnosis.
Area of Science:
- Orthopedic oncology
- Skeletal radiology
- Pediatric pathology
Background:
- Chondroblastomas (CB) typically occur in the epiphyseal/apophyseal regions of long bones.
- Primary metaphyseal or diaphyseal chondroblastomas are exceptionally rare and pose diagnostic challenges.
Observation:
- This study reviewed seven cases (1.8% of 390) of histologically confirmed chondroblastomas located purely in the metaphysis and/or diaphysis.
- Patient demographics included four males and three females aged 2-25 years.
- Lesions were found in the proximal femur, distal femur, proximal humerus, clavicle, and proximal radius.
Findings:
- Radiological findings included marginal sclerosis (100%), periosteal reaction (71%), and cortical expansion (57%).
- Chondroid matrix was present in 57% of cases.
- Imaging modalities like CT, MRI, and bone scan revealed matrix, perilesional edema, and intense uptake, respectively.
Implications:
- Pure metaphyseal/diaphyseal chondroblastomas are rare but should be considered in the differential diagnosis for bone lesions in the appropriate age group.
- Characteristic imaging features can suggest this diagnosis, but biopsy may still be necessary.
- Awareness of this rare entity is crucial for accurate diagnosis and appropriate treatment planning.
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