a rare group of skin disorders characterized by tender, painful bumps below the surface of the skin (subcutaneous nodules) that usually lead to inflammation of the subcutaneous layer of fat (panniculitis). These nodules tend to be 1-2 centimeters in length and most often affect the legs and feet. Nodular non-suppurative panniculitis, known as Weber-Christian disease (WCD), is a rare skin disorder characterized by recurring inflammation in the subcutaneous layer of fat.