I am not sure where to post this since there is not a lab test/diagnostic section. Has anyone ever had, or heard of a doctor suggesting, a T-cell/B-cell ratio lab test? This is not the same as Th1/Th2 ratio. Anyway, this test is widely available (e.g. through Labcorp) and apparently AIDS patients sometimes use it, but is pretty expensive at around $500. I am just wondering if any useful information could be found by having this test. It would be interesting if anyone ever had an abnormal result. A second look at the B-cell depletion (rituximab) study from Norway prompted me to think about this. I don't think I've seen any published research which tested this parameter in their patients.