MSTN and laryngotracheoesophageal cleft: In addition, we found a close inverse correlation between serum myostatin level and psoas muscle mass as assessed by CT at the L3 level in LC patients (median psoas muscle index (high vs. low serum myostatin group); 4.84 cm2/m2 vs. 6.37 cm2/m2 (p < 0.0001) in males and 3.87 cm2/m2 vs. 4.25 cm2/m2 (p = 0.0175) in females) [58].