Right posterior cervical well-defined intermuscular soft tissue mass lesion. The mass consisted of fat signal interspersed with soft tissue signal. The fatty component is eliciting high signal on T1 and T2 with signal suppression on the fat sat images and no post contrast enhancement ,while the internal soft tissue component eliciting persistent low signal on all pulse sequences with mild post contrast enhancement yet with no diffusion restriction, suggestive of fibrous nature. The lesion displaces the adjacent muscles and causes focal contour bulge.
Provisional diagnosis was posterior neck intermuscular fatty mass containing fibrous tissue (likely fibrolipoma), however atypical lipomatous tumour or well-differentiated liposarcoma could not be ruled out.