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目的 Tobetterunderstandtherarecaseofpulmonarybenignmetastasizingleiomyoma.方法 AcaseofpulmonarybenignmetastasizingleiomyomaofmenopausalageisdiagnosedinBeijinghospital.结果 A59一year—oldwomansufferedfrommildcheststuffiness.ChestCTshowedmultiplenodulesinbothsidesofherlungs.Thetumormarkerswerenormal.PET-CTshowednosignsofmalignancy.ThepatientthenunderwentCTguildedlungbiopsy.HEstainingshowedthatthetumorcellshadcharacteristicsofsmoothmusclecelldifferentiation.