hi, my husband had an ultra scan last week and here is the report. Right kidney - 9.8 x 3.8 cm, A simple cortical cyst 9 x 9 mm is seen at upper pole Left Kidney - 9.7 x 5.6 cm, A large 5.9 x 4.5 x 4.7 cm thin wall cystic mass is seen at inter polar region, multiple thin internal septations are seen Impression - Large septated left reanal cystic mass leison s / o complex cyst. Advised to be further asseed by cest Small right renal simple cortical cyst Can you please explain what it means or is it dangerous? Thanks