The ultra sonographic findings suggest hydronephrosis
of the left kidney. Causes for this could be many, most common being an obstruction at various levels in the urinary system
. The earlier the diagnosis, the better is the outcome. The condition is mostly treatable as the root cause can most often be relieved. In your case, the two favorable conditions are -firstly, the condition has not involved both the kidneys and secondly, the pelvicalyceal diameter is less than 15 mm., which is the indicator for future renal disease
. Please do a follow up with your doctor and a nephrologist
. Good luck.