Case Presentation: An 8-year-old female with a history of Guillain-Barre syndrome (GBS) presented with chronic weight loss and constipation for seven months. Exam revealed a small for age, developmentally delayed female with aphasia, inability to ambulate, and a distended but non-tender abdomen. CBC revealed normocytic anemia (Hgb 11.1) and iron deficiency. Additional laboratory testing showed [...]