Depend on your doctor's final word to guide you. Doctors rarely rely on imaging studies without knowing the patient's history and doing an exam. Many clinical tests can be done to find the exact tendon that's involved.

A misdiagnosed torn rotator cuff usually goes the other way. In other words, there's a tear but the image shows a normal tendon. It would be rare (but possible) to have a normal tendon diagnosed as torn. This could occur when there is what's called an artifact, a blip in the picture. Artifacts come from extra electronic signals. Another possible reason for a wrong diagnosis is that the radiologist looking at the image can misread it.

One benefit to in-office ultrasound testing for orthopedic surgeons is the doctor's knowledge of the patient. The patient doesn't have to depend on the results read by a radiologist who has never seen the patient.

The surgeon has the advantage when looking at the image of knowing how the patient presented. The test can be done at the time of the exam, saving the patient from having to make another appointment on another day.