What Does It Mean If My Left Kidney Is Mildly Smaller, With Increased Cortical Echogenicity And Compromised Cortico-medullary Differentiation?

Left kidney is mildly smaller in size and irregular in outline.Biopolar length of the left kidney is 9.7 cm cortical echo genecity is increased.cortico medullary differentiation is moderate to severely compromised. Cortical thickness of left kidney is 1.3 cm.pelvicalyceal system is not dilated of both kidney. What does all mean. Is the left kidney functioning