Visualisation of focal renal lesions on ultrasound: A review of 518 lesions with contrast CT correlation.

Visualisation of FRLs is size-dependent. High rate of visualisation is achieved once the lesion exceeds 15 mm in size. Small FRLs are associated with a low rate of visualisation on ultrasound; however, they are rarely concerning. Hyperdense lesions on CECT that carry high suspicion of malignancy are associated with a high rate of US visualisation.