Common Overlap Diagnoses in CFS Cases

I have recently evaluated the overlapping illnesses often associated with CFS including chronic lyme, mold related illness, FM, MCS, IBS and allergies (both food and inhalants). To do this I used patient report questionnaires to help dissect out the important question of the frequency of these overlapping diagnoses in a CFS-only practice. Questionnaires lack some of the diagnostic precision of more detailed case definitions but the inherent biases already built into a CFS-only specialty practice would exist despite any improvement gained by using more accurate case definition discriminators such as exam and laboratory data, if they exist at all.