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Primary mesenteric extraskeletal osteosarcoma in the pelvic cavity.
H N Choudur1, P L Munk, T O Nielson
1Department of Radiology, Vancouver General Hospital, 899 West 12th Avenue, Vancouver, BC, V5Z 1M9, Canada. hnalinic@yahoo.com
Skeletal Radiology
|April 19, 2005
Summary
A rare primary mesenteric extraskeletal osteosarcoma was incidentally discovered in a patient investigated for constipation. This calcified pelvic mass represents a unique case previously undescribed in medical literature.
Area of Science:
- Oncology
- Radiology
- Pathology
Background:
- Extraskeletal osteosarcomas are rare malignant bone tumors that can arise in soft tissues.
- Mesenteric tumors are uncommon, and primary osteosarcomas of the mesentery are exceedingly rare.
Observation:
- Incidental radiographic finding of a large, densely calcified, rounded mass in the pelvic cavity during investigation for constipation.
- Computed tomography (CT) scan confirmed the mass, prompting surgical excision.
- Differential diagnoses included calcified hematoma and enlarged calcified lymph nodes.
Findings:
- Histopathological examination revealed the mass to be a primary mesenteric extraskeletal osteosarcoma.
- This represents the first reported case of such a tumor originating from the mesentery in the English literature.
Implications:
- Highlights the importance of considering rare diagnoses in cases of unexplained calcified masses.
- Contributes to the understanding of extraskeletal osteosarcomas and their potential locations.
- Emphasizes the role of advanced imaging and histopathology in diagnosing rare tumors.