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Angiomyolipoma arising in the thigh
1Department of Radiology, Kyoto Prefectural University of Medicine, Japan.
Skeletal Radiology
|July 7, 2000
Summary
A thigh mass was diagnosed as angiomyolipoma (AML) using MRI and CT scans. This rare tumor presentation in the adductor muscles highlights the importance of advanced imaging for diagnosis.
Area of Science:
- Radiology
- Oncology
- Pathology
Background:
- Angiomyolipomas (AMLs) are rare mesenchymal tumors typically found in the kidney.
- Extraskeletal AMLs are exceptionally rare, with few documented cases in the thigh.
- This case highlights an unusual presentation of AML in the thigh musculature.
Observation:
- A 41-year-old male presented with an asymptomatic 10-cm mass in the right medial thigh.
- MRI revealed a well-demarcated mass with specific signal intensities on T1 and T2 weighted images, showing changes with fat suppression.
- Dynamic CT demonstrated enhancing spotty areas within the tumor during the arterial phase.
Findings:
- The mass exhibited characteristic MRI signal intensities and enhancement patterns post-Gd-DTPA injection.
- Dynamic CT showed arterial phase hyperenhancement, suggestive of vascular components.
- Surgical resection yielded a yellow-whitish tumor, pathologically confirmed as thigh angiomyolipoma.
Implications:
- This case expands the known anatomical locations for extraskeletal angiomyolipoma.
- Advanced imaging techniques like MRI and CT are crucial for diagnosing rare soft tissue tumors.
- Accurate preoperative diagnosis can guide surgical planning and patient management for thigh masses.