title: Retroperitoneal Bronchogenic Cyst Presenting Paraadrenal Tumor Incidentally Detected by (18)F-FDG PET/CT.
abstract: A follow-up (18)F-fluorodeoxyglucose ((18)F-FDG) PET/CT scan of a 57-year-old asymptomatic male who had undergone total thyroidectomy for thyroid cancer revealed a 5.0 × 4.0-cm, well-defined, ovoid-shaped mass around the left adrenal gland without definite FDG uptake. On the adrenal CT scan, the left paraadrenal tumor showed high attenuation on the precontrast scan without enhancement. The average Hounsfield unit (HU) was 58.1 on the precontrast scan and 58.4 on the postcontrast scan. The patient underwent laparoscopic adrenalectomy for resection of the left paraadrenal tumor. The final histopathologic examination revealed a bronchogenic cyst. Although retroperitoneal bronchogenic cysts are rare, they should be considered in the differential diagnosis of retroperitoneal cystic tumors. The preoperative diagnosis is difficult, but a contrast-enhanced CT scan or (18)F-FDG PET/CT scan may be useful for differentiating hyperattenuated cysts from other soft tissue masses.
authors.affiliation: Department of Radiology, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
authors.forename: Ye Ri
authors.initials: YR
authors.lastname: Yoon
authors.affiliation: Department of Nuclear Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea ; 23-20 Byeongmyeong-dong, Dongnam-gu, Cheonan, Chungcheongnam-do Republic of Korea.
authors.forename: Jiyoun
authors.initials: J
authors.lastname: Choi
authors.affiliation: Department of Nuclear Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
authors.forename: Sang Mi
authors.initials: SM
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
authors.forename: Yeo Joo
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Pathology, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
authors.forename: Hyun Deuk
authors.initials: HD
authors.lastname: Cho
authors.affiliation: Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Jeong Won
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of Urology, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea.
authors.forename: Youn Soo
authors.initials: YS
authors.lastname: Jeon
keywords: 18F-FDG PET/CT; Bronchogenic cyst; CT; Retroperitoneal cyst