PMC3443572_01
(a) antroposterior radiography revealed osteolytic well-defined lesion without marginal sclerosis and cortical destruction. (b) lateral radiography revealed eccentric exophytically osteolytic lesion without calcification or marginal sclerosis.
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fig1
Antero-posterior and lateral (Figures 1(a) and 1(b)) X-rays revealed a well-defined eccentric osteolytic lesion in the distal diaphysis of left ulna with expansion of overlying cortex and without calcification.
T1 W coronal image showed a well-defined low signal ovoid intramedullary lesion measured 2*1 cm in the distal diaphysis of left ulnar bone that was protruding exophytically from medial surface of ulnar bone.
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fig2
The lesion was of low signal intensity on T1-weighted images (Figure 2) and high intensity signal on the T2-weighted (Figure 3) and fat-saturated fast spin-echo T2-weighted images (Figure 4).
T2 W coronal image showed a well-defined high signal ovoid intramedullary lesion measured 2*1 cm in the distal diaphysis of left ulnar bone that was protruding exophytically from medial surface of ulna bone.
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fig3
The lesion was of low signal intensity on T1-weighted images (Figure 2) and high intensity signal on the T2-weighted (Figure 3) and fat-saturated fast spin-echo T2-weighted images (Figure 4).
Fat-saturated fast spin-echo T2-weighted axial image showed a well-defined high signal ovoid intramedullary lesion measured 2*1 cm in the distal diaphysis of left ulnar bone that was protruding exophytically from medial surface of ulna bone.
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fig4
The lesion was of low signal intensity on T1-weighted images (Figure 2) and high intensity signal on the T2-weighted (Figure 3) and fat-saturated fast spin-echo T2-weighted images (Figure 4).
Histopathology showed a cartilaginous tissue with uniformly sized chondrocytes located in the round lacunae in a myxoid matrix.
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fig5
Histopathology showed a cartilaginous tissue with uniformly sized chondrocytes in a myxoid matrix located in the round lacunae, compatible with enchondroma and with no evidence of cytological dysplastic cell (Figure 5).