title: Intracranial yolk sac tumor in an adult patient: MRI, diffusion-weighted imaging and 1H MR spectroscopy features.
abstract: BACKGROUND
  Yolk sac tumors represent only 5%-7% of intracranial germ cell tumors, which comprise about 1% of all primary brain tumors in adults. Literature data about nonspecific imaging characteristics of these tumors are scant. We presented magnetic resonance imaging findings with diffusion-weighted imaging and proton magnetic resonance spectroscopy of this rare type of tumor in an adult patient.
  
  
  METHODS
  A 55-year-old man with progressive left side weakness, headache, dizziness and ataxia, underwent preoperative magnetic resonance imaging, diffusion-weighted imaging and proton magnetic resonance spectroscopy. After surgical resection and histological analysis, the final diagnosis of yolk sac tumor was established. Retrospective imaging analysis were performed in order to determine imaging and biochemical parameters that could be useful in the diagnostic evaluation of this tumor type.
  
  
  CONCLUSIONS
  Though the imaging features of yolk sac tumor are not specific, morphoanatomical and metabolic imaging could offer the information that provides new insights into this tumor that may facilitate further therapeutic decision process and potentially provides better information regarding the disease prognosis.
authors.affiliation: Radiology and Magnetic Resonance Imaging Center, Clinical Center of Serbia, Belgrade, Serbia. macvanskimarjia@yahoo.com
authors.forename: Marija
authors.initials: M
authors.lastname: Macvanski
authors.forename: Dragana
authors.initials: D
authors.lastname: Ristić-Balos
authors.forename: Brankica
authors.initials: B
authors.lastname: Vasić
authors.forename: Slobodan
authors.initials: S
authors.lastname: Lavrnić
authors.forename: Svetlana
authors.initials: S
authors.lastname: Gavrilović
authors.forename: Mihajlo
authors.initials: M
authors.lastname: Milićević
authors.forename: Sanja
authors.initials: S
authors.lastname: Milenković
authors.forename: Tatjana
authors.initials: T
authors.lastname: Stosić-Opinćal
mesh_terms: D001932:Brain Neoplasms / Q000175:diagnosis*; D038524:Diffusion Magnetic Resonance Imaging; D018240:Endodermal Sinus Tumor / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged