However, in a recent case report, the syndromic CFEOM phenotype caused by the c.2015T > C(p.Leu672Pro) variant of the KIF21A gene illustrates that KIF21A mutation may result in multiple damage to the nerve system, rather than only involvement in the ocular motor nerve [12]. The gene discussed is KIF21A; the disease is congenital fibrosis of the extraocular muscles.