title: Benign metastasizing leiomyoma of the lung with malignant transformation mimicking mediastinal tumor.
abstract: We report a rare case of benign metastasizing leiomyomas (BMLs) showing malignant transformation in one of them. A 65-year-old woman had a fever. Computed tomography (CT) revealed a mass on the left side of the anterior mediastinum and multiple nodules in bilateral lungs. The masses proved to be leiomyomas and a leiomyosarcoma. The latter showed heterogeneous contrast enhancement on CT and high heterogeneous uptake of (18)F-fluorodeoxyglucose (FDG) on positron emission tomography (PET)-CT. This case suggested the potential usefulness of PET-CT for differentiating these entities.
authors.affiliation: Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan. eternal@fj9.so-net.ne.jp
authors.forename: Masaki
authors.initials: M
authors.lastname: Ogawa
authors.forename: Masaki
authors.initials: M
authors.lastname: Hara
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Ozawa
authors.forename: Satoru
authors.initials: S
authors.lastname: Moriyama
authors.forename: Motoki
authors.initials: M
authors.lastname: Yano
authors.forename: Shigeki
authors.initials: S
authors.lastname: Shimizu
authors.forename: Yuta
authors.initials: Y
authors.lastname: Shibamoto
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007150:Immunohistochemistry; D007889:Leiomyoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary* / Q000601:surgery; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed; D014594:Uterine Neoplasms / Q000473:pathology*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18