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.
Tree Nut Allergy. From the popular almond, cashew, and walnut to the lesser-known pine nut and lichee nut, tree nuts come in many shapes and sizes. Along with peanuts and shellfish, tree nuts are one of the food allergens most often linked to anaphylaxis â a serious, rapid-onset allergic reaction that may be fatal. A tree nut allergy usually lasts a lifetime; fewer than 10 percent of people with this allergy outgrow it.