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Abstract #3478

Differentiating Tumour vs. Pseudotumoural Disease vs. Normal Brain with SV 1H-MRS

Margarida Juli-Sap1,2, Carles Majs1,3, Mnica Cos3, Carles Aguilera1,3, Carles Ars1,2

1CIBER-BBN, UAB, Cerdanyola del Valls, Barcelona, Spain; 2Bioquimica i Biologia Molecular, Universitat Autonoma de Barcelona, Cerdanyola del Valles, Barcelona, Spain; 3Hospital Universitari de Bellvitge, Institut de Diagnostic per la Imatge (IDI), L'Hospitalet de Llobregat, Barcelona, Spain

Our purpose was to differentiate tumors from pseudotumoral disease and normal brain with SV-1H-MRS at short and long TE. Inclusion criteria for tumors and pseudotumors were: 1) presence of an untreated solid non-necrotic brain mass suggesting a brain tumor, 2) diagnosis of pseudotumoral disease or glial tumor grades II or III of the WHO confidently established, 3) to have spectra available obtained at both short and long TE, and 4) the spectra to be of good quality at visual inspection. At short TE, 95.2% of cases were correctly classified whereas at long TE, 96.8% of cases were correctly classified.