While there is a linear correlation between the proportion of Treg cells/total lymphocytes in BM samples by flow cytometry and CTLA4 expression by qPCR in 19 samples, it is also clear that for three of the 16 samples (one MM and 2 MGUS/PS) qPCR and flow cytometry data do not correlate. The gene discussed is CTLA4; the disease is Miyoshi myopathy.