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.
Food Allergy -- walnuts. Food Allergy -- walnuts: Introduction. Food Allergy -- walnuts: A walnut allergy is an adverse reaction by the body's immune system to walnuts or food containing walnuts. The body's immune system produces immunoglobulin E (IgE - an antibody) and histamine in response to contact with the allergen.