1 Two-part, three-part and four-part fractures can occur. 2  The fractures are then classified by their degree of displacement and angulation. 3  Surgical neck fractures are the most common type of proximal humeral fracture.
About 1.8 million people in the United States experience allergies to tree nuts, the Food Allergy and Anaphylaxis Network reports. Like other tree nuts, walnuts can cause a range of unpleasant reactions.
Oak Pollen Allergy Symptoms. Oak tree pollen causes allergy symptoms in the late winter and spring. Overview. Spring brings leaves to the oak trees and sends oak pollen into the air, causing millions of allergy sufferers to reach for the antihistamines and tissue.