Synovial sarcoma

120 views535y Female10/9/2026

Clinical Presentation

Right thigh swelling.

1Rounded but ill-defined soft tissue swelling is located posteromedial to the femur
2There is evidence of cortical erosion which appears to have a relatively wide zone of transition
3The mass itself demonstrates no calcification
4Incidental note is made of contrast in the bladder from the preceding CT scan (not shown)
5MRI of the thigh confirms the presence of a large heterogeneous mass extending into all compartments
6It enhances brightly but irregularly with areas of presumed necrosis
7Erosion of the femur is also shown without however evidence of extension into the bone marrow on axial images
8There is extensive oedema extending proximal and distal to the mass
9Bone scan demonstrates elevation of activity on both dynamic and blood pool views
10Bone phase shows only minor local increase (not shown).