title: Hibernoma--two patients with a rare lipoid soft-tissue tumour.
abstract: BACKGROUND
  Hibernomas are rare benign soft-tissue tumours arising from brown fat tissue. Although imaging characteristics are not specific certain imaging features, common locations and patient demographics may suggest hibernoma as a differential diagnosis.
  
  
  METHODS
  We report on two 48-year-old male patients with hibernoma. The tumour presented with local swelling of the inguinal region in the first patient and was an incidental imaging finding in the second patient. Imaging included magnetic resonance imaging in both patients and computed tomography as well as 18F-fluorodeoxyglucose positron emission tomography-computed tomography in the second patient. In both cases histological diagnosis was initially based on excisional and needle core biopsy, respectively. Complete surgical resection confirmed the diagnosis of hibernoma thereafter.
  
  
  CONCLUSIONS
  In soft tissue tumours with fatty components hibernoma may be included into the differential diagnosis. Because of the risk of sampling errors in hibernoma-like tissue components of myxoid and well-differentiated liposarcoma, complete resection is mandatory. This article also reviews the current imaging literature of hibernomas.
authors.affiliation: Department of Neuroradiology, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Dirk.Daubner@uniklinikum-dresden.de.
authors.forename: Dirk
authors.initials: D
authors.lastname: Daubner
authors.affiliation: Department of Radiology, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Stephanie.Spieth@uniklinikum-dresden.de.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Spieth
authors.affiliation: Department of Pathology, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Jessica.Pablik@uniklinikum-dresden.de.
authors.forename: Jessica
authors.initials: J
authors.lastname: Pablik
authors.affiliation: Department of Nuclear Medicine, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Klaus.Zoephel@uniklinikum-dresden.de.
authors.forename: Klaus
authors.initials: K
authors.lastname: Zöphel
authors.affiliation: Department of Radiology, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Tobias.Paulus@uniklinikum-dresden.de.
authors.forename: Tobias
authors.initials: T
authors.lastname: Paulus
authors.affiliation: Department of Radiology, Carl Gustav Carus Medical School, University of Dresden, Fetscherstraße 74, 01307, Dresden, Germany. Michael.Laniado@uniklinikum-dresden.de.
authors.forename: Michael
authors.initials: M
authors.lastname: Laniado
mesh_terms: D003937:Diagnosis, Differential; D003952:Diagnostic Imaging / Q000379:methods*; D006801:Humans; D008067:Lipoma / Q000175:diagnosis* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis*; D035583:Rare Diseases / Q000175:diagnosis; D016896:Treatment Outcome