title: Comparison of Dynamic Contrast-Enhanced MRI and PET/CT in the Evaluation of Laryngeal Cancer After Inadequate CT Results.
abstract: BACKGROUND
  To investigate the diagnostic value of dynamic magnetic resonance imaging (MRI) and positron emission tomography/computed tomography (PET/CT) for laryngeal cancers after inadequate CT results.
  
  
  METHODS
  The study comprised 45 patients investigated for primary laryngeal cancer or recurrence-residue in which CT was considered inadequate. A mass was found in 20 patients. Dynamic MRI and PET/CT were compared for diagnosis of mass, lymph node involvement, recurrence and residue. The dynamic curves formed in dynamic MRI were investigated for diagnostic contributions.
  
  
  RESULTS
  The sensitivity and specificity of the dynamic MRI, for supraglottic, glottic and subglottic location, was 100%, 80%, and 92%; 100%, 85%, and 100%, respectively. In PET/CT the sensitivity and specificity were 100% for all of those localizations. For lymph node involvement, the sensitivity of dynamic MRI and PET/CT was 100%, the specificity was 100% and 93%, respectively. For recurrence-residue, the sensitivity and specificity of dynamic MRI were 86% and 67%, respectively, with 100% sensitivity and specificity in PET/CT. The sensitivity of type A curve for detection of malignancy was 40%, and specificity was 100%. When type A and B curves were included, the sensitivity was 100%.
  
  
  CONCLUSIONS
  For patients investigated for laryngeal cancer in which CT is considered inadequate, dynamic MRI or PET/CT is useful.
authors.affiliation: Division of Radiology, Ministry of Health Kahramanmaras Necip Fazıl City Hospital, Kahramanmaras, Turkey.
authors.forename: Serdal
authors.initials: S
authors.lastname: Citil
authors.affiliation: Department of Radiology, Erciyes University Hospital, Kayseri, Turkey.
authors.forename: Serap
authors.initials: S
authors.lastname: Dogan
authors.affiliation: Division of Nuclear Medicine, Ministry of Health Kahramanmaras Necip Fazıl City Hospital, Kahramanmaras, Turkey.
authors.forename: Hasan Ikbal
authors.initials: HI
authors.lastname: Atilgan
authors.affiliation: Department of Radiology, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Mehmet Sait
authors.initials: MS
authors.lastname: Menzilcioglu
authors.affiliation: Division of Radiology, Ministry of Health Malatya State Hospital, Malatya, Turkey.
authors.forename: Tuna
authors.initials: T
authors.lastname: Sahin
authors.affiliation: Department of Nuclear Medicine, Erciyes University School of Medicine, Kayseri, Turkey.
authors.forename: Ummuhan
authors.initials: U
authors.lastname: Abdulrezzak
authors.affiliation: Department of Radiology, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Mahmut
authors.initials: M
authors.lastname: Duymus
authors.affiliation: Division of Nuclear Medicine, Ministry of Health Kahramanmaras Necip Fazıl City Hospital, Kahramanmaras, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Ozturk
keywords: Laryngeal Neoplasms; Magnetic Resonance Imaging; Tomography, Emission-Computed