What is the obturator sign associated with?

The obturator sign is specifically associated with appendicitis, making it the correct choice. This sign is a clinical indicator used during the physical examination of a patient who may have appendicitis. It is elicited when flexing the hip and knee while rotating the leg internally causes pain in the right lower quadrant. This pain occurs due to irritation of the obturator internus muscle, which can happen when the inflamed appendix is in contact with surrounding structures.

In the context of appendicitis, the physical signs—and particularly the obturator sign—help differentiate it from other abdominal conditions, as appendicitis often presents with localized right lower quadrant pain and specific clinical signs. Understanding the significance of this sign can assist practitioners in making prompt and accurate diagnoses in acute care settings.