What is widening or dilation of a calyx?

Widening or dilation of a calyx refers to the abnormal enlargement of the calyx, which is a cup-like structure in the kidney that collects urine from the renal papillae before it moves to the renal pelvis. This condition can occur due to various factors, such as obstruction of urine flow, kidney stones, or infections, leading to a buildup of urine. Dilation can be detected through imaging studies like ultrasounds or CT scans and may indicate underlying kidney pathology that requires further investigation or treatment.