I-cell disease, or Inclusion-cell disease, is an extremely rare inherited metabolic disorder characterized by coarse facial features, skeletal afflictions and developmental delays. I-cell disease is also known as: GNPTA, Inclusion Cell Disease, Leroy Disease, ML Disorder, Type II, ML II, Mucolipidosis II, or N-Acetylglucosamine-1-Phosphotransferase Deficiency. If this disorder has touched your life, this book gives you the information you need to know about causes and treatment options.