Hi My daughter, who is 21, has been having back pain. Mainly in the kidney area, on the left side. She had a ultrasound performed and this is what her results show: FINDINGS: Bilateral extrarenal pelves versus mild pelviectasis, unchanged post void. The kidneys otherwise appear normal in size, contour, and echotexture. The right kidney measures approximately 11 x 5.2 x 4.3 cm. Left kidney measures approximately 11 x 5.4 x 6.3 cm. Prevoid appearance of the bladder is normal. A left jet is identified. A right jet could not be identified. There is a 4 cc post void residual This is Greek to me, so would love an explanation in plain terms. Thanks you! Hilda