A 53-year-old woman presented with a renal angiomyolipoma extending as a thrombus into the renal vein and vena cava. This case is most unusual and we are unaware of any report of a benign angiomyolipoma that has presented as a tumor thrombus. The intravascular growth of a benign angiomyolipoma has previously been described.
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Baert et al. (1995) studied this question.
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