Ultrasonogram of the oval shape of the left kidney in sagittal view in a five-year-old llama. Note the echoic cortex (C), anechoic medullary pyramids (MP) and the hyperechoic renal sinus (SI) and renal hilus (H), as viewed through the left paralumbar fossa using a 6.6 MHz probe. CA: capsule, AW: abdominal wall, S: spleen, cr: cranial, cd: caudal