Some types of CDG, including ALG3-CDG, ALG6-CDG, ALG9-CDG, ALG12-CDG, PGM3-CDG, CSGALNACT1-CDG, SLC35D1-CDG, and TMEM-165, were reported with well-defined skeletal dysplasia (61–69). The gene discussed is ALG12; the disease is skeletal dysplasia.