Ultrasonogram of the right kidney in a four-year-old alpaca using a 6.6 MHz probe. Sagittal view through the region of the medullary pyramids as scanned from the right paralumbar region. The right kidney of an alpaca with the cortex (C), the medullary pyramids (MP) and the hyperechoic capsule (CA), as viewed from the right paralumbar fossa. Measurements of the length and width of the kidney and the width of the cortex and medullary pyramids are shown. AW abdominal wall, cr cranial, cd caudal