CRP, or C-reactive protein, is a protein that is produced in the liver and is part of the body's immune response to inflammation or infection. CRP can be determined by laboratory blood tests. The value of CRP helps doctors distinguish between viral and bacterial infections. CRP can also be elevated in other diseases and not just in infections.

Celiac disease is a chronic systemic autoimmune disease, which is a result of hypersensitivity to gluten. It most commonly affects the small intestine. Gluten is a protein that we find in wheat and some other grains. Patients often have digestive disorders. As a result, there may be a lack of basic food components, minerals, and vitamins in the body.

The term "clubbed fingers" refers to the shape of the fingers. Clubbed fingers are thickened at the ends, and the nails on clubbed fingers are also wider and larger. Clubbed fingers can occur in various diseases (e.g., lung and digestive diseases).