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.
Nine of every 10 food allergies results from sensitivity to any one of eight foods, the U. S. Food and Drug Administration reports. Tree walnuts and other tree nuts are among these eight food allergens. A walnut allergy typically lasts a lifetime. Walnuts can show up in baked goods, liqueur, candy, pesto, ice cream, salad dressings or toppings, and trail mixes. Walnut oil, although a good source of healthful omega-3 fatty acid, also can trigger allergies. Symptoms of a walnut allergy range from mild to life-threatening.