Figure 1.

Physical examination showed a 8.0 cm×6.0 cm well-defined ulcerated lesion in the skin of the extensor side of his right knee. A solitary nodular lesion, measuring 1.5 cm in diameter was also found near the large ulcerated lesion (black arrow).

Li et al. Diagnostic Pathology 2013 8:20   doi:10.1186/1746-1596-8-20
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