Nucl Med Mol Imaging.  2015 Mar;49(1):69-72. 10.1007/s13139-014-0306-0.

Retroperitoneal Bronchogenic Cyst Presenting Paraadrenal Tumor Incidentally Detected by 18F-FDG PET/CT

• Yoon YR
• Choi J
• Lee SM
• Kim YJ
• Cho HD
• Lee JW
• Jeon YS

• KMID: 2313249
• DOI: http://doi.org/10.1007/s13139-014-0306-0

Abstract

A follow-up 18F-fluorodeoxyglucose (18F-FDG) PET/CT scan of a 57-year-old asymptomatic male who had undergone total thyroidectomy for thyroid cancer revealed a 5.0 x 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 18F-FDG PET/CT scan may be useful for differentiating hyperattenuated cysts from other soft tissue masses.

Keyword

Bronchogenic cyst; Retroperitoneal cyst; CT; 18F-FDGPET/CT

MeSH Terms

Adrenal Glands
Adrenalectomy
Bronchogenic Cyst*
Diagnosis
Diagnosis, Differential
Fluorodeoxyglucose F18*
Follow-Up Studies
Humans
Male
Middle Aged
Positron-Emission Tomography and Computed Tomography*
Thyroid Neoplasms
Thyroidectomy
Tomography, X-Ray Computed
Fluorodeoxyglucose F18