PMC2852764_01
Mid-portion of the calf viewed from the anterior aspect. A bulging, non-tender and elastic hard mass was covered with the thin and atrophic skin.
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Physical examination showed a bulging, non-tender and elastic hard mass covered with thin and atrophic skin on the mid-portion of the anterior aspect of the left calf (Figure 1).
Plain radiographs of the left leg revealed a soft tissue mass in the anterolateral part of the leg with extensive amorphous calcifications (arrow).
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Plain radiographs of the left leg revealed a soft tissue mass in the anterolateral part of the leg with extensive amorphous calcifications (Figure 2).
Postcontrast CT showed a 4x6 cm sized mass with central low signal density (asterisk) and peripheral high density, suggesting fluid and peripheral calcification. The space between the tibia and fibula was also enhanced (arrow).
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The space between the tibia and fibula was also enhanced (Figure 3).
Magnetic resonance imaging demonstrated that the contents of the masses were isointense with muscles on T1-weighted images and hyperintense on T2-weighted images, with peripheral low signal intensity foci representing calcification. Postcontrast fat-suppressed T1-weighted image showed peripheral ring enhancement (arrow).
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Postcontrast fat-suppressed T1-weighted imaging showed peripheral ring enhancement (Figure 4).
Volume-rendered image extracting only the images of bone and vessels showed many branches from the tibialis posterior artery and peroneal artery around the bone defect.
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We also applied volume-rendered imaging, extracting only the images of bone and vessels, which showed many branches from the tibialis posterior and peroneal arteries around the bone defect (Figure 5).