Overall, enhanced risk of BD was noticed under the codominant homozygous, dominant, and allelic models of TCF4 rs1261084C/T, codominant homozygous and allelic models of CACNA1C rs10466907G/T polymorphisms as well as codominant homozygous, dominant, recessive, and allelic models of the CACNA1C rs10774053A/G. Here, TCF4 is linked to Behcet disease.