U/s thyroid shows homogeneous parenchyma on left and right no mass or nodule what does this mean? so what is homogeneous parenchyma?

Good!: Homogeneous parenchyma is just a fancy way for the person reading the report to say the thyroid appears to be similar in texture and color throughout the entire thyroid. This is a good thing as it implies a uniform thyroid without areas of irregularity or inflammation and most people reading these reports will tend to err on the side of caution & at least say there is some irregularity. Good Luck!