A Doughnut Sign of a Hydatid Cyst of the Liver on F-18 FDG PET/CT

DEMİR H., Halac M. , Yilmaz S., İŞGÖREN S., Sonmezoglu K. , Uslu I.

CLINICAL NUCLEAR MEDICINE, vol.33, no.12, pp.876-877, 2008 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Editorial Material
  • Volume: 33 Issue: 12
  • Publication Date: 2008
  • Doi Number: 10.1097/rlu.0b013e31818bf2df
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.876-877
  • Istanbul University Affiliated: Yes


A 59-year-old man underwent a whole-body PET/CT scan to evaluate the metabolic activity of a nodule in the upper lobe of the left lung seen on CT. Slightly increased peripheral activity with a large hypometabolic region centrally, a so-called doughnut sign, was seen in the right lobe of the liver. After the diagnosis of a hydatid cyst of the liver, the patient underwent surgery. This case demonstrates a hydatid cyst that caused increased F-18 FDG uptake as a doughnut pattern.