According to what I have learnt in diagnosing appendicitis, Blumberg's sign refers to the pain on sudden release of pressure on the RIGHT lower quadrant. However, when I read 'Evidence Based Physical Diagnosis' by Steven McGee, I got confused: "Rebound tenderness was originally described by J. Moritz Blumberg (1873-1955), a German surgeon and gynecologist, who believed that pain in the lower abdomen after abrupt withdrawal of the hand from the left (*: the word is in italics in the book) lower quadrant was a sign of appendicitis (i.e., Blumberg's sign)" Did that idea come from J. Moritz Blumberg at first? Or is there a mistake? (Which I hardly think it is likely) By the way, the reference used for this sentence comes from Bailey's Demonstrations of physical signs in clinical surgery (11th ed), but I cannot find this book to check the information, either. I am looking forward to your replies. Thank you in advance.