A primary bone dysplasia with micromelia characterized by macrocephaly, narrow thorax, and distinctive facial features. It includes TD, type 1 (TD1) and TD, type 2 (TD2), that can be differentiated from each other by femur and skull shape. The disease is Monarch Disease Ontology id MONDO_0017042 (thanatophoric dysplasia). Also known as: FGFR3-related thanatophoric dysplasia, TD, thanatophoric dwarfism.