Where is McBurney's point located?

McBurney's point is a clinically significant anatomical landmark used in the assessment of appendicitis. It is located approximately one-third of the way along the line from the anterior superior iliac spine (ASIS) to the umbilicus. This point corresponds to the typical location of the base of the appendix where it attaches to the cecum, and it is used by clinicians to help localize abdominal pain that may arise from appendicitis.

By identifying McBurney's point, physicians can assess tenderness, which is a key sign in diagnosing appendicitis. The emphasis on the one-third distance along this line reflects the anatomical variations observed in the location of the appendix in the majority of individuals.

The other distances mentioned in the options do not accurately reflect the accepted location of McBurney's point in relation to the ASIS and umbilicus, which is why they are not used as standard references in clinical practice.