Imaging findings of desmoplastic fibroma rarely involving the clavicle: case report

Abstract

Desmoplastic fibroma of bone is a rare locally aggressive, but non-metastatic tumor. In this case report, we present a desmoplastic fibroma in an unusual location, the clavicle. Desmoplastic fibroma involving the clavicle is extremely rare, with only 2 reported cases before 1985. We report the imaging findings of a desmoplastic fibroma of the clavicle with a review of the relevant literature.

Keywords: Bone tumor; Clavicle; Desmoplastic; Fibroma.

Fig. 1

Desmoplastic fibroma of clavicle in 28-year-old man. A. Part of plain anteroposterior radiograph of right clavicle reveals well-defined non-sclerotic marginated geographic lesion on medial one-third of right clavicle, with pathologic fracture. B-D. Coronal (B) T1-weighted magnetic resonance image shows hypointense to isointense signal compared to adjacent muscle, and lesion also demonstrates hypointense to isointense signal on axial (C) T2-weighted image. Gadolinium enhanced T1-weighted coronal (D) image reveals heterogeneous enhancement of mass. Also, adjacent bone marrow and soft tissue along periosteum are enhanced. E. Microscopic examination shows bland fibroblasts in background of numerous thick and wavy collagen fibers without evidence of cellular pleomorhpism, changes in nuclear-cytoplasmic ratio or mitotic activity (H&E, × 200).