PMC9969429_01
X-ray (a) demonstrates a well-circumscribed osteolytic lesion involving the
diaphysis of both the right radius and ulna with spiculated periosteal
reaction. Ultrasonography images (b) show a heterogeneous intra-muscular
mass, containing hypoechoic areas, and poorly vascularized on color
Doppler.
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X-ray examination exhibited a soft-tissue mass encompassing the two bones of the forearm in a circumferential way, with well-defined margins, associated with medullary bone lysis, a significant discontinuous spiculated periosteal reaction, and a deformation of the bones' axes (Figure 1(a)). Ultrasound showed a heterogeneous poorly vascularized mass (Figure 1(b)).
A 12-year-old young girl with infantile fibromatosis in the right forearm.
(a) Coronal T2WI demonstrates a lobulated, heterogeneous hyperintense mass
with irregular strip hypo intensities (arrows). (b) On coronal T1WI, the
mass is homogeneous and isointense, with medullar bone lesion presenting the
same characteristics. (c) The lesion is hyperintense on diffusion. (d) On
contrast-enhanced axial FS T1WI, the lesion shows inhomogeneous marked
enhancement with non-enhanced hypointense fibrous areas.
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