How do you diagnose a rotator cuff injury?

How do you diagnose a rotator cuff injury? So diagnosis as most things in medicine is from the initial history, what was the mechanism of injury, if there was an injury involved, what is the subsequent condition of the patient following the injury and then to a clinical examination usually in the clinic setting and then followed by to confirmatory imaging including ultrasound or MRI. If you have a high index of suspicion for a rotator cuff injury or tear then actually in an experienced hand the ultrasound is actually as effective and more easily available than the MRI. But in scenarios where things are in doubt then the MRI can be more helpful.