Answer:
PAROSTEAL LIPOMA
Findings
FOCAL CORTICAL THICKENING WITH OSSIFIC PROTUBERANCES/HYPEROSTOSES IN THE DISTAL FEMUR AND LARGE HOMOGENOUS LIPOMATOUS COMPONENT INVOLVING THE VASTUS INTERMEDIUS MUSCLE .
THIS APPEARANCE IS PATHOGNOMONIC OF PAROSTEAL LIPOMA AND NO FURTHER INVESTIGATION IS GENERALLY WARRANTED
Discussion
Bone lipomas are among the rarest neoplasias of the skeleton, accounting for less than 0.1% of primary bone tumors and 15% of all osseous lipomas, often affecting the femur.
Prominent hyperostosis is a typical appearance that, when combined the radiolucence of the soft parts of the tumor, has been described as pathognomonic for parosteal lipoma
Contributed By:
Dr. Babu Peter MD, DNB
Associate Professor, Barnard Institute of Radiology, Chennai
Senior Consultant Radiologist, Aarthi Scans, Chennai
PAROSTEAL LIPOMA
Findings
FOCAL CORTICAL THICKENING WITH OSSIFIC PROTUBERANCES/HYPEROSTOSES IN THE DISTAL FEMUR AND LARGE HOMOGENOUS LIPOMATOUS COMPONENT INVOLVING THE VASTUS INTERMEDIUS MUSCLE .
THIS APPEARANCE IS PATHOGNOMONIC OF PAROSTEAL LIPOMA AND NO FURTHER INVESTIGATION IS GENERALLY WARRANTED
Discussion
Bone lipomas are among the rarest neoplasias of the skeleton, accounting for less than 0.1% of primary bone tumors and 15% of all osseous lipomas, often affecting the femur.
Prominent hyperostosis is a typical appearance that, when combined the radiolucence of the soft parts of the tumor, has been described as pathognomonic for parosteal lipoma
Contributed By:
Dr. Babu Peter MD, DNB
Associate Professor, Barnard Institute of Radiology, Chennai
Senior Consultant Radiologist, Aarthi Scans, Chennai