[Imaging features and differentiated diagnosis of desmoplastic fibroma of the jaw bones].

To investigate the imaging feature of desmoplastic fibroma (DF) of the jaw bones.The records including diagnostic radiograph images of 8 patients were retrospectively analyzed. The age of the 8 patients ranged from 2 years to 70 years (means,28 years). The numbers of males and females were 3 and 5 respectively. Of 8 patients, 4 had local recurrence, which occurred 1 year after curettage.On conventional radiographs, the lesion was presented as a purely lytic tumor that did not contain any mineralized matrix. The zone of transition between tumor and normal bone was typically narrow and well defined but not sclerotic. Bone expansion in DF had an eccentric (n=3) and lace-like, reticular pattern (n=3). On CT scan, increased bone marrow density (n=3), a homogeneous soft-tissue density mass displaced adjacent muscle with lingual cortex eroded (n=3) were noted. On MRI, the lesion was displayed as large bony destruction area, with homogeneous hypointensity on T1-weighted images, non-homogenous hyperintensity on T2-weighted and did not enhance after Gd-DTPA administration. Images with Choline peek (Cho, at 3.2 ppm) was displayed at TE of 144 ms( PRESS, single voxel).Six mandibular cases and 2 maxillary tumors were located posteriorly.Recognition of DF is important because DF is more aggressive than other benign fibrous lesions, necessitating a wide surgical and careful long-term follow-up for local recurrence.