PMC3505889_01
Coronal T1-weighted (500/22 [TR/TE msec]) image of the chest shows a well-defined oval mass of homogeneous signal intensity within the subcutaneous fat of the left axilla.
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fig1
Axial fat-suppressed fast-spin echo T2-weighted (8500/63) image of the right axilla shows homogeneous increased signal intensity throughout the lesion. There is no surrounding soft tissue edema pattern and the adjacent bone marrow signal is normal.
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fig2
T2-weighted images (Figure 2). There was marked diffuse homogeneous enhancement throughout the lesion following the administration of intravenous contrast (Figure 3). The remaining subcutaneous fat and adjacent muscle were normal, without surrounding inflammatory changes.
Following intravenous contrast administration, there is homogeneous enhancement throughout the lesion on a fat-suppressed T1-weighted (450/22) coronal image.
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fig3
T2-weighted images (Figure 2). There was marked diffuse homogeneous enhancement throughout the lesion following the administration of intravenous contrast (Figure 3). The remaining subcutaneous fat and adjacent muscle were normal, without surrounding inflammatory changes.
(a) The cut surface of the mass is firm, grayish white, with focal gelatinous areas. (b) Microscopic examination shows islands and elongated lobules of mature benign hyaline cartilage (hematoxylin-eosin, original magnifications x100). (c) The cartilage consisted of bland appearing chondrocytes in lacunae (hematoxylin-eosin, original magnifications x400).
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fig4
The cut surface was firm, grayish white, with focal gelatinous areas (Figure 4(a)). The lesion was composed of islands and elongated lobules of mature benign hyaline cartilage with well-vascularized fibrous stroma (Figure 4(b)). The cartilage consisted of bland appearing chondrocytes in lacunae (Figure 4(c)) with a hypercellular zone at the periphery of the nodules.