title: Colon cancer metastatic to a urachus diagnosed by PET/CT.
abstract: A 50-year-old man presented with a mass in the transverse colon diagnosed by colonoscopy. He underwent a left hemicolectomy and was diagnosed with a moderately differentiated adenocarcinoma penetrating into the pericolic adipose but no lymph node metastases. His course was uneventful with enrollment in a monoclonal antibody research treatment protocol. Eight years later, he presented with hematuria. A PET/CT demonstrated a hypermetabolic right external iliac lymph node and a hypermetabolic mass within a urachal remnant. The mass was excised and pathologically proven to represent a metastasis from the original primary tumor.
authors.affiliation: Department of Radiology, Dartmouth Hitchcock Medical Center, Lebanon, NH 03756, USA.
authors.forename: Robert
authors.initials: R
authors.lastname: Percarpio
authors.forename: Alan
authors.initials: A
authors.lastname: Siegel
authors.forename: Marc
authors.initials: M
authors.lastname: Seltzer
mesh_terms: D003110:Colonic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*
chemical_list: D019788:Fluorodeoxyglucose F18