Relation between plasma glucosylsphingosine and disease manifestations or bone marrow markers. (A) Plasma glucosylsphingosine and disease severity score (SSI; n = 46). (B) Plasma glucosylsphingosine and liver volume (n = 45). (C) Plasma glucosylsphingosine and skeletal disease (n = 48). (D) Plasma glucosylsphingosine and bone marrow fat fraction (n = 34). (E) Plasma glucosylsphingosine and osteocalcin (n = 24). (F) Plasma glucosylsphingosine and P1NP (n = 24).