A clonal translocation (7;8)(p13;q11.2) in a leiomyoma of the vulva.

We present the first case of a vulvar leiomyoma studied by cytogenetics. The tumor formed a 3.0-cm periurethral nodule in a middle-aged woman and was positive for the muscle markers desmin and caldesmon, and for estrogen and progesterone receptors. Its karyotype was 46,XX,t(7;8)(p13;q11.2). This translocation has not been described in previously reported leiomyomas, regardless of their site of origin. The transcription factor PLAG1 gene at 8q12 was not altered by the translocation.