Étude de la vascularisation tumorale apport de l'échographie-Doppler

Purpose : The purpose of this study was to evaluate the usefulness of Doppler sonography in quantifying tumor vascularization and in determining hemodynamic parameters by spectral analysis. Materials and Methods : A total of 100 malignant tumors of different histologic types, were prospectively studied with spectral, colorcoded and power Doppler sonography (Toshiba 140 A with 3.75 and 7.5 MHz probes). Internal or peripheral vascularization was scored from O (absence of color flow) to +++ (numerous vessels inside and/or beside the mass). Three parameters were calculated for each arterial waveform recorded : the peak systolic velocity (PSV, n = 84), the resistive index (Rl, n = 130) and the pulsatility index (Pl, n = 115). Results : Tumoral vascularization was scored 0 in 13 cases, + in 39 cases, ++ in 29 cases and +++ in 19 cases. The mean value of the PSV was about 0.30 m/s. Rl values ranged from 0.35 to 1 (mean = 0.63). Pl values were <1 in 28 cases and >2 in 15 cases (mean = 1.68). Conclusion : Our results confirm the wide variability in tumor vascularization and in hemodynamic parameters values in malignant tumors.