GPC6 and autosomal recessive omodysplasia: Recessive OMOD (OMOD type 1/OMOD1) is associated with homozygous mutation of the glypican 6 (GPC6) gene and differs from RS and dominant OMOD (OMOD type 2/OMOD2) in that it reliably correlates with short stature among other differential features (Bayat et al., 2020; Arabzadeh et al., 2022).