What is macroscopic hematuria?

Macroscopic hematuria refers to the presence of blood in the urine that is significant enough to be seen with the naked eye. This type of hematuria can cause the urine to appear pink, red, or brown, depending on the amount of blood present and its concentration. It often indicates an underlying issue such as infection, kidney stones, or trauma.

In contrast, microscopic hematuria, which is not the focus here, involves blood that can only be detected through microscopic examination, not visible to the naked eye. The other options do not accurately define macroscopic hematuria; normal red blood cell counts and urine with high specific gravity are unrelated to the visible presence of blood in urine. Thus, the focus on visible blood encapsulates the definition of macroscopic hematuria perfectly.