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a, b The computed tomographic scan showed an expansive mass based on the sternal manubrium. The tumor extended across the destroyed cortex to the parietal and visceral soft aspects, involving some of the costal cartilage and most of the sternal body. c, d The size of the tumor was about 10 × 8 × 6 cm. The histological examination of the surgical specimen confirmed the diagnosis of chondromyxoid fibroma
