title: Intrascrotal dedifferentiated leiomyosarcoma originating from dartos muscle.
abstract: A 46-year-old man, who had visited our hospital complaining of a small intrascrotal nodule ten years ago, returned to us because of the rapid growth of the nodule. Computed tomography revealed a heterogeneously enhanced intrascrotal tumor of approximately 4 × 3 cm. The tumor and the right testis were excised with the adhered right scrotal skin. The pathological diagnosis was pleomorphic leiomyosarcoma with dedifferentiation originating from the dartos muscle. Urological dedifferentiated leiomyosarcomas are rarely reported and the clinical features are mostly unknown. This is the first report to describe the dedifferentiated leiomyosarcoma of the dartos muscle.
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Teshima
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Sayuri
authors.identifier: 0000-0002-6991-026X
authors.initials: S
authors.lastname: Takahashi
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Nagamoto
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Hideyo
authors.initials: H
authors.lastname: Miyazaki
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Tohru
authors.initials: T
authors.lastname: Nakagawa
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Fujimura
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fukuhara
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Haruki
authors.initials: H
authors.lastname: Kume
authors.affiliation: Department of Urology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Homma