PMC4921171_01
Ultrasound of the swelling showing a hypoechoic soft-tissue mass surrounding the clavicle (A) without inner vascular signal on color Doppler imaging (B).
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The patient underwent sonography of the right sternoclavicular region, which revealed a hypoechoic, round lesion in the medial periclavicular soft tissues, approximately 18 mm by 9 mm in size, without internal vascular flow (Fig. 1).
Axial T2 fat-saturated (a) and T1 gradient echo (b) weighted images illustrate the presence of an expansive ovoid mass tightly in contact with the sternal meta-epiphisary side of the right clavicle. Axial T1 (c-d), and sagittal T2 and T2 fat-saturated (e-f), weighted images show the infiltration of the lesion into the ventral side of the clavicle. Note the extension of the tumor with an oblique coronal T1-weighted image (g).
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It had regular edges, low signal on all the pulse sequences, and no variations after fat suppression (Fig. 2).
Right posterior oblique plain film. Note the osteolytic areas at the sternal side of the right clavicle meta-epiphisis.
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We noted the moth-eaten appearance of the metaphyseal region of the clavicle (Fig. 3).
Axial postcontrast CT slice shows the infiltration of the dysplastic tissue into the bone.
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A CT scan of the chest was performed for staging; there were no pulmonary nodules, but the bone involvement was confirmed (Fig. 4).