A patient reports right shoulder pain with diffuse paresthes…

A pаtient repоrts right shоulder pаin with diffuse pаresthesias intо the hypothenar eminence, fourth and fifth fingers. The patient also reports coolness and swelling in the hand when he uses his arm overhead at work. No myotomal or dermatomal deficits noted. Spurling's test is negative for symptom reproduction. Which of the following choices is the MOST likely diagnosis responsible for the patient's signs and symptoms?