title: (18)F-fluorodeoxyglucose positron emission tomography/computed tomography-positive lymph node endometriosis masquerading as lymph node metastasis of a malignant tumor.
abstract: Endometriosis is defined as the presence of endometrium-like tissues at extrauterine sites, most commonly in the abdominal cavity. Lymph node endometriosis is a rare but clinically important type of endometriosis that can mimic lymph node metastasis of a malignant tumor. (18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography/computed tomography (PET/CT) is a useful tool for diagnosing malignant tumors, although it occasionally shows false positive results in tissues with high metabolic activity caused by severe inflammation. In the present report, we describe a case of lymph node endometriosis that mimicked lymph node metastasis of a malignant tumor and showed a positive result on (18)F-FDG PET/CT. The findings of the present case suggest that lymph node endometriosis could present as swollen lymph nodes with (18)F-FDG PET/CT-positive results and provide important information for determining an appropriate treatment strategy.
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Makoto
authors.identifier: 0000-0001-8856-8300
authors.initials: M
authors.lastname: Akiyama
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Izumi
authors.identifier: 0000-0002-0525-6297
authors.initials: I
authors.lastname: Suganuma
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Taisuke
authors.initials: T
authors.lastname: Mori
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Izumi
authors.identifier: 0000-0001-5563-9707
authors.initials: I
authors.lastname: Kusuki
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Haruo
authors.identifier: 0000-0001-7658-5226
authors.initials: H
authors.lastname: Kuroboshi
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Fumitake
authors.identifier: 0000-0001-6847-0779
authors.initials: F
authors.lastname: Ito
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsushima
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Morio
authors.initials: M
authors.lastname: Sawada
authors.affiliation: Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Jo
authors.identifier: 0000-0002-4359-959X
authors.initials: J
authors.lastname: Kitawaki