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No joint effusion (grade 0). a-c Sagittal oblique fat-saturated T2-weighted fast spin echo images (TR/TE 5,400/77 ms). There is no high signal intensity fluid within the joint compartments in a 3-year-old boy (a). There is a normal amount of fluid in the anterior recesses (arrows in b) in a 14-year-old boy and in the superior joint compartment (arrow in c) in a 14-year-old girl
