Melorheostosis with recurrent soft-tissue components: a histologically confirmed case
Shoichi Hasegawa1, Shotaro Kanda1, Hiroki Imada2
1Department of Orthopaedic Surgery, Saitama Medical Center, Jichi Medical University, 1-847 Amanuma, Omiya-ku, Saitama, 330-8503, Saitama, Japan.
Skeletal Radiology
|January 8, 2017
Summary
Melorheostosis, a rare bone disorder, can involve soft-tissue ossification. This case highlights the first histological confirmation of this rare melorheostosis feature, differentiating it from synovial chondromatosis.
Area of Science:
- Orthopedics
- Radiology
- Pathology
Background:
- Melorheostosis is a rare skeletal dysplasia characterized by irregular cortical thickening.
- It typically presents with pain and can affect any bone, often with a 'dripping candle wax' radiographic appearance.
Observation:
- A 51-year-old male presented with chronic, severe right knee pain due to an ossified soft-tissue lesion.
- Radiographs revealed irregular cortical thickening consistent with melorheostosis.
- Microscopic examination confirmed dense compact bone in the soft-tissue component, without endochondral ossification.
Findings:
- This case presents the first histological confirmation of a soft-tissue component in melorheostosis.
- The ossified soft-tissue lesion demonstrated dense compact bone, distinct from synovial chondromatosis.
- Surgical excision of the lesion provided relief from intractable pain.
Implications:
- Accurate histological differentiation of melorheostosis's soft-tissue component from conditions like synovial chondromatosis is crucial.
- Understanding these soft-tissue manifestations aids in diagnosis and management of melorheostosis.
- This finding expands the known pathological spectrum of melorheostosis.
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