title: Clinical value of classification of venous malformations with contrast-enhanced MR Angiography.
abstract: Aim To classify venous malformations based on contrast-enhanced MR angiography that may serve as a basis for treatment plan. Patients and methods A retrospective analysis was performed in 58 patients with venous malformations who underwent contrast-enhanced MR angiography. Venous malformations were classified according to their venous drainage into: type I, isolated malformation without peripheral drainage; type II, malformation that drains into normal veins; type III, malformation that drains into dilated veins; and type IV, malformation that represents dysplastic venous ectasia. Image analysis was done by two reviewers. Intra and inter-observer agreement of both reviewers and intra-class correlation was done. Results The intra-observer agreement of contrast-enhanced MR angiography classification of venous malformations was excellent for the first reviewer ( k = 0.83, 95% CI = 0.724-0.951, P = 0.001) and substantial for the second reviewer ( K = 0.79, 95% CI = 0.656-0.931, P = 0.001). The inter-observer agreement of contrast-enhanced MR angiography classification of venous malformations was excellent for both reviewers at the first time ( K = 0.96, 95% CI = 0.933-1.000, P = 0.001) and second time ( k = 0.81, 95% CI = 0.678-0.942, P = 0.001). There was high intra-class correlation of both reviewers for single measure ( ICC = 0.85, 95% CI = 0.776-0.918, P = 0.001) and for average measures ( ICC = 0.96, 95% CI = 0.933-0.978, P = 0.001). Conclusion Contrast-enhanced MR angiography classification of venous malformations may be a useful, simple and reliable tool to accurately classify venous malformation and this topographic classification helps for better management strategy.
authors.affiliation: Faculty of medicine, Department of diagnostic Radiology, Mansoura University, Mansoura, Egypt.
authors.forename: Ahmed Abdel Khalek
authors.initials: AAK
authors.lastname: Abdel Razek
authors.affiliation: Faculty of medicine, Department of diagnostic Radiology, Mansoura University, Mansoura, Egypt.
authors.forename: Germeen Ashmalla
authors.initials: GA
authors.lastname: Albair
authors.affiliation: Faculty of medicine, Department of diagnostic Radiology, Mansoura University, Mansoura, Egypt.
authors.forename: Sieza
authors.initials: S
authors.lastname: Samir
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003287:Contrast Media / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D012189:Retrospective Studies; D054079:Vascular Malformations / Q000145:classification* / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media
keywords: MR angiography; Venous malformation