Symptoms that have traditionally been considered to be the expected manifestations of celiac disease by which the diagnosis is made. Most patients with classic signs and symptoms visit their doctor because of nutritional deficiencies, anemia, weight loss, bloating, abdominal pain, steatorrhea, and diarrhea that can range from mild to massive. Classic signs and symptoms in children may also include lassitude, failure to thrive, irritability, a protruding abdomen.