title: Ultrastructural study of a perineurioma with ribosome-lamella complexes.
abstract: The participation of the perineurial cell in peripheral nerve tumors is the subject of much debate. The case of a 75-year-old female with a soft tissue tumor on her left shoulder is presented. The tumor had histological, ultrastructural, and immunohistochemical characteristics of a pure perineurial cell neoplasm. Ultrastructurally, distinctive ribosome-lamella complexes were found in the cytoplasm of the perineurial cells. This may be the first time that these structures have been described in perineurioma.
authors.affiliation: Departamento de Anatomía Patológica, Universidad Complutense de Madrid, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Dhimes
authors.forename: M A
authors.initials: MA
authors.lastname: Martinez-Gonzalez
authors.forename: E
authors.initials: E
authors.lastname: Carabias
authors.forename: G
authors.initials: G
authors.lastname: Perez-Espejo
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007425:Intracellular Membranes / Q000648:ultrastructure*; D009442:Neurilemmoma / Q000648:ultrastructure*; D009454:Neurofibrils / Q000648:ultrastructure*; D010524:Peripheral Nervous System Neoplasms / Q000648:ultrastructure*; D012270:Ribosomes / Q000648:ultrastructure*; D012785:Shoulder Joint / Q000648:ultrastructure