TTN and arthrogryposis multiplex congenita: According to the clinical presentation and molecular diagnosis, 32 of the 51 patients (32/51, 62.7%) were classified as having Amyoplasia, and 19 (19/51, 37.2%) were classified as having other types of AMC: 16 cases of distal arthrogryposes due to pathogenic variants in PIEZO2 (n = 4), ECEL1 (n = 3), TNNI2 (n = 3), TPM2 (n = 2), MYH3 (n = 1), FBN2 (n = 1), CHRNG (n = 1), and TTN (n = 1); 1 case of FLNB; 1 case of TRPV4; and 1 case of ZC4H2. The mean age was 32.9 ± 12.6 years.