A woman came with the complaint of pain in her right arm when she abducts it. She has recently moved to a new house. There is no history of trauma. Wht is the likely cause of her pain?

The key is D. Supraspinatus tendinitis. [Tendinitis and partial tears in the supraspinatus tendon causes a ‘painful arc’ since as the person elevates his arm sideways, the tendon begins to impinge under the acromion throught the middle part of the arc, and this is usually relieved as the arm reaches 180 degrees (vertical)].