Fig 3.

A 10-year-old boy with a residual chordoma in the nonaggressive tumor group. A, Three years after the first operation, T2-weighted imaging shows an expansile mass in the clivus (arrows). B, The ROI outlined in yellow on the ADC map represents increased water diffusivity (ADC = 1.808 × 10⁻³ mm²/s). C, The mass was stable on T2-weighted imaging obtained 13 months later (volume change ratio = 0.11; arrowheads) with a doubling time of 10.0 years. He was still alive 7 years after the second MR imaging.