Figure 1.

Associations between serum tryptophan and kynurenine levels and skeletal muscle mass. (a) Representative axial computed tomography images of the third lumbar (L3) vertebral region, with the skeletal muscle highlighted in red, of a male patient with a high L3-skeletal muscle index (SMI) (left) and a female patient with a low L3-SMI (right). Correlation between L3-SMI and (b) serum tryptophan and (c) kynurenine levels in 54 patients with diffuse large B-cell lymphoma. The Pearson product-moment correlation coefficient (r = 0.39) and p < 0.01 indicated a positive correlation between SMI and the serum Trp concentration.