Fig. 1: Maximum diameter of renal tumours when detected according to imaging modality and whether it was the first scan of that type.

a Distribution of renal tumour sizes and imaging: MRI (First) = tumours detected on first renal MRI scan in that individual; MRI = tumours detected on a MRI scan in individuals with previous MRI or CT scans; CT (First) = tumours detected on first renal CT scan in that individual; CT = tumours detected on a CT scan in individuals with previous MRI or CT scans; USS (First) = tumours detected on first renal ultrasound scan in that individual; USS = tumours detected on a renal ultrasound scan in individual with previous renal ultrasonography. b Details of imaging modality to detect tumours of different sizes (same data as in (a) but expressed as a % of total tumours of that size).