The common reasons for the left kidney not being visualized in renal dynamic examination are the loss of left kidney function or the existence of urinary tract obstruction, or even the absence of left kidney.
Renal dynamic examination is mainly to understand the renal function, whether the urinary tract is smooth, etc. Under normal circumstances, both sides will be visualized at the same time.
If there is no image on the left side, the first consideration is the complete loss of renal function or the absence of the left kidney, such as the congenital absence of the left kidney or the left nephrectomy surgery. If there is a delay in visualization, it is more likely that the left ureteral obstruction leads to hydronephrosis, which needs to be combined with CT examination and retrograde pyelogram to clarify the cause of the disease.
If the left kidney does not show up in renal dynamic examination, it is recommended to go to the regular hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.