You have done very well Son,
Just goes to show the value of listening to your patient and always putting the transducer on exactly the location of the symptoms even if you are sceptical that you will see anything.
In the end it sounds like a serious pathology, especially at the very young age of 21.
I think you have done this patient a great service as it is unlikely it would have been escalated to an MRI without your excellent observation and recommendation.
This gives the patient the earliest possible diagnosis and best outcome probability.
This is pure ultrasound at its best.
You are to be congratulated.
Great work Son,
Steve.