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Case report 734. Fibroma of tendon sheath eroding 3rd metatarsal bone
J A Lourie1, K Y Lwin, C G Woods
1Milton Keynes Hospital, UK.
Skeletal Radiology
|January 1, 1992
Summary
A rare fibroma of tendon sheath was diagnosed in a 37-year-old man presenting with a bone-eroding soft tissue lesion. This diagnosis was unexpected as giant cell tumors of tendon sheath are more common and radiologically indistinguishable.
Area of Science:
- Orthopedic Surgery
- Oncology
- Radiology
Background:
- Soft tissue tumors adjacent to bone present diagnostic challenges.
- Giant cell tumors of tendon sheath (GCTTS) are a common bone-eroding lesion.
- Radiological differentiation between similar soft tissue lesions can be difficult.
Observation:
- A 37-year-old male presented with an extrinsic soft tissue lesion near the 3rd metatarsal.
- The lesion demonstrated smooth erosion of the adjacent bone on imaging.
- The clinical presentation suggested a bone-involving soft tissue tumor.
Findings:
- Operative findings confirmed the lesion as a fibroma of tendon sheath.
- This diagnosis was surprising given the radiological similarity to more common GCTTS.
- Fibroma of tendon sheath is a rare differential diagnosis for bone-eroding soft tissue masses.
Implications:
- Highlights the importance of histopathological confirmation for soft tissue tumors.
- Suggests a need for increased awareness of rare differentials in orthopedic oncology.
- Emphasizes the limitations of radiological assessment in distinguishing certain soft tissue tumors.