Name : Alireza
Family : Almasi
Affiliation :Radiology Department,Firoozgar
Academic Degree : Associate Professor of Radiology
Resident : Maryam soleimanpour
Gender : Male
Age : 45
45 years old man with swelling of thigh
a soft tissue in median of right femur that has low to intermediate signal intensity on Tl-weighted MR images and heterogeneous high signal intensity on T2-weighted images.
Discussion (Related Text)
Synovial sarcoma is a malignant soft tissue tumor that develops from undifferentiated mesenchymal cells; despite its name, it does not arise from synovium. It is relatively common, following malignant fibrous histiocytoma, liposarcoma, and rhabdomyosarcoma in prevalence. There is a slight male predilection and a peak incidence between 15 and 35 years of age.Less than 10% of synovial cell sarcomas are within a joint. Usually they are adherent to a joint capsule, bursa, fascia, or tendon sheath. They are most common in the lower extremity. Synovial sarcoma has low to intermediate signal intensity on Tl-weighted MR images and heterogeneous high signal intensity on T2-weighted images. This tumor is often multilocular with internal septation and fluid-fluid levels are occasionally seenCalcifications are present in 30% of cases and are best seen on Cf.s The presence of extensive calcification indicates a better prognosis.
ohn R Haga:CT and MRI of the whole body;5th edition.volume 2;chapter45,page 2154,2155