The study reveals a large rather ill-defined border lobular shape soft tissue mass in flexor/ anterior compartment of right forearm. This lesion has invaginated along fascia of flexor muscles of right forearm, measured about 17.6x4.1x3.4 cm (Length x Width x AP). This lesion has low signal intensity on T1wi and high signal intensity on T2wi. After gadolinium administration, intense enhancement is seen after gadolinium administration.