title: Prostate cancer with cyst formation detected by whole body positron emission tomography/computed tomography: A case report.
abstract: The present study reports a case of prostate adenocarcinoma with cyst formation. A 72-year-old male diagnosed with multiple lung metastases at a local clinic was referred to Tokai University Hachioji Hospital (Tokyo, Japan) for detection of a primary lesion. Whole body positron emission tomography/computed tomography showed strong accumulation of [18F]-fluoro-deoxy-2-glucose (FDG) in the small pelvis, and pelvic magnetic resonance imaging revealed a 60×40-mm cystic lesion, with an irregular thickened wall, behind the prostate. The serum prostate-specific antigen (PSA) level was elevated to 211.99 ng/ml, therefore, the patient underwent a transperineal prostate needle biopsy, and was diagnosed with prostate adenocarcinoma with cyst formation. Androgen deprivation therapy was administered for 8 months following the diagnosis of prostate cancer; consequently, the cyst reduced in size and the serum PSA level decreased to 0.14 ng/ml. To the best of our knowledge, this is the first report of a malignant prostatic cyst detected by FDG-positron emission tomography/computed tomography.
authors.affiliation: Department of Urology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
authors.forename: Hakushi
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Urology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
authors.forename: Sunao
authors.initials: S
authors.lastname: Shoji
authors.affiliation: Department of Urology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Tomonaga
authors.affiliation: Department of Urology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Shima
authors.affiliation: Department of Urology, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan.
authors.forename: Toshiro
authors.initials: T
authors.lastname: Terachi
authors.affiliation: Department of Urology, Tokai University Hachioji Hospital, Hachioji, Tokyo 192-0032, Japan.
authors.forename: Toyoaki
authors.initials: T
authors.lastname: Uchida
keywords: cyst formation; positron emission tomography/computed tomography; prostate cancer