#PathSky 37M with a large retroperitoneal mass. Big, fatty thing. The outside quite rightly worried about well-differentiated LPS and a lipomatous angiomyolipoma, but MDM2, SMA and melanocytic markers were negative. Some WDL are MDM2-neg/MDM4-pos. Should we do more molecular ? Or something else?
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https://pubmed.ncbi.nlm.nih.gov/10524520/