Which abbreviation is associated with a bone injury?

The abbreviation associated with a bone injury is commonly recognized as "Fx," which stands for "fracture." In medical terminology, "Fx" is predominantly used by healthcare professionals to indicate that a bone has been broken or fractured. This concise abbreviation is essential in medical documentation, as it allows for quick communication regarding the patient's condition.

The other options pertain to different medical concepts. "GU" refers to the genitourinary system, "ETT" typically stands for endotracheal tube, which is used in airway management, and "GCS" stands for Glasgow Coma Scale, a scoring system used to assess consciousness level in patients. Each of these abbreviations serves its specific purpose in medical contexts, but none relate directly to bone injuries like "Fx" does.