title: A rare case of urachal mucinous adenocarcinoma detected by 18F-FDG PET/CT.
abstract: A 48-year-old woman presented with abdominal pain, and her initial investigations, which included an abdominal ultrasound and a pelvic MRI examination, revealed a dominant soft tissue mass abutting her left iliac bone, extensive pelvic adenopathy, and multiple osseous metastases. The findings were concerning for chondrosarcoma; however, biopsy results were consistent with mucinous carcinoma of unknown origin. A staging 18F-FDG PET/CT revealed a mildly FDG-avid soft tissue mass with scattered calcifications extending to the dome of the urinary bladder, highly suggestive of a primary tumor. Cystoscopy with tissue sampling of this mass demonstrated a primary mucinous adenocarcinoma of the urachus.
authors.affiliation: From the PET/CT Center, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, Jinan City, Shandong Province, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Songtao
authors.initials: S
authors.lastname: Liu
authors.forename: Shuzhan
authors.initials: S
authors.lastname: Yao
authors.forename: Muwen
authors.initials: M
authors.lastname: Wang
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology; D002288:Adenocarcinoma, Mucinous / Q000000981:diagnostic imaging* / Q000473:pathology; D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis / Q000556:secondary; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008279:Magnetic Resonance Imaging; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18