title: Detection of a primary tumor in the area of the renal artery with 18F-FDG PET/CT in a patient with metastatic undifferentiated sarcoma and a history of mid-aortic syndrome: A case report.
abstract: BACKGROUND
  We present a case of a 57-year-old woman patient with a history of mid-aortic syndrome, treated with several vascular procedures, who was referred for investigation of metastatic disease of an undifferentiated sarcoma of unknown origin.
  
  
  METHODS
  Positron emission tomography/computed tomography (PET/CT) demonstrated multiple fluorodeoxyglucose (F-FDG) avid lung, liver, and osseous metastases as well as a focus of increased F-FDG uptake in the area of the stented left renal artery.
  
  
  RESULTS
  Histologic evaluation of soft tissue from the region of the left renal artery revealed atypical spindle cells, consistent with an intimal sarcoma, and with histopathological characteristics identical to those of lung metastases, indicating the F-FDG avid lesion in the area of the renal artery as the origin of the metastatic disease.
  
  
  CONCLUSIONS
  This case highlights the capacity of F-FDG PET/CT to detect primary tumors even of small size and in unusual localisations. Moreover, it provides further indications regarding the potential association between foreign body reaction on the basis of chronic inflammation and sarcoma development.
authors: Institute of Nuclear Medicine Institute of Pathology, University Hospital Bern Department of Medical Oncology, University Hospital Bern, Sarcoma Center Inselspital, Bern, Switzerland.
authors: Christos
authors: C
authors: Sachpekidis
authors: Rupert
authors: R
authors: Langer
authors: Atilla
authors: A
authors: Kollàr
authors: Jan
authors: J
authors: Wartenberg
mesh_terms: D001018:Aortic Diseases / Q000150:complications / Q000601:surgery; D001859:Bone Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D008875:Middle Aged; D010384:Pelvic Bones / Q000187:drug effects*; D000072078:Positron Emission Tomography Computed Tomography; D019275:Radiopharmaceuticals; D012077:Renal Artery / Q000000981:diagnostic imaging*; D012509:Sarcoma / Q000000981:diagnostic imaging* / Q000556:secondary; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18