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  Indian J Med Microbiol
 

Figure 4: Gray-scale ultrasonography (a) and color Doppler ultrasonography (b) study of the veins of the lower extremity was performed. (a) Ultrasonography shows materials with heterogeneous echogenicity in the lumen of the posterior tibial vein which is distended (arrow), suggesting a newly formed thrombus. Color Doppler ultrasonography (b) shows a filling defect in the corresponding site. Obstruction of the flow is evident (arrow)

Figure 4: Gray-scale ultrasonography (a) and color Doppler ultrasonography (b) study of the veins of the lower extremity was performed. (a) Ultrasonography shows materials with heterogeneous echogenicity in the lumen of the posterior tibial vein which is distended (arrow), suggesting a newly formed thrombus. Color Doppler ultrasonography (b) shows a filling defect in the corresponding site. Obstruction of the flow is evident (arrow)