title: [Two benign vascular tumors of the kidney capsule].
abstract: Capsular tumors of the kidney are uncommon or poorly documented. The authors report two cases of benign vascular tumors: a so-called "vascular leiomyoblastoma" and a glomus tumor. An ultrastructural study of the first tumor demonstrated smooth muscular characteristics. Obvious histological features of glomus were seen in the second. Immunohistochemical study revealed positive immunoreactivity for epithelial and mesenchymal antibodies in the two tumors. Glomus tumor originates from the particular system of vessels in the capsule. Histogenesis of the vascular leiomyoblastoma is more controversial. This tumor could be akin to leiomyomas of the renal capsule and intra parenchymatous leiomyomas; lymphatic origin and even a glomangiomatous nature are also possible explanations.
authors.affiliation: Service d'anatomie et Cytologie Pathologiques, Centre Hospitalier Régional et Universitaire de Saint Etienne, Hôpital Bellevue.
authors.forename: F
authors.initials: F
authors.lastname: Billard
authors.forename: J M
authors.initials: JM
authors.lastname: Dumollard
authors.forename: J
authors.initials: J
authors.lastname: Cucherousset
authors.forename: S
authors.initials: S
authors.lastname: Boucheron
authors.forename: A
authors.initials: A
authors.lastname: Baril
mesh_terms: D000368:Aged; D005260:Female; D005918:Glomus Tumor / Q000737:chemistry / Q000473:pathology*; D006391:Hemangioma / Q000737:chemistry / Q000473:pathology*; D006801:Humans; D007124:Immunoenzyme Techniques; D007680:Kidney Neoplasms / Q000737:chemistry / Q000473:pathology*; D007889:Leiomyoma / Q000737:chemistry / Q000473:pathology*; D008297:Male; D008875:Middle Aged
vernacular_title: Deux tumeurs vasculaires bénignes de la capsule du rein.