... body myositosis or Pompe. She has the respiratory muscle weakness as well as trouble walking and also has hand weakness and droopy eyelids. She goes for Ivig treatment but it is not clear how helpful it is. How do you differentiate between these 3 illnesses with similar symptoms? She is still undiagnosed after 3 years. Her pulmonologist thinks she has Pompe, but she was told her GAA is not low according to a blood panel. But the test might have been wrong? She is 48 years old. Any insight would be sppreciated. Thanks in advance