Description: A new minimally invasive procedure is a quick, inexpensive way to treat tendonitis in the shoulder, Italian researchers report. The researchers used ultrasound-guided percutaneous (through the skin) therapy to treat the shoulders of more than 2,000 people (average age 42) with calcific tendonitis, characterized by the formation of small calcium deposits within the tendons of the rotator cuff. These deposits can cause pain and restrict mobility.