由于DiGeorge综合征为常染色体显性遗传,父母一方患病是下一代患病的高危险因素。若父母一方患病,每胎有50%的几率患病,且下一代表现更为严重。
虽然这种危险因素不常见,双亲中的表现可能极其不明显,由于父母患病则未来孩子患病风险大,仍然建议仔细检查并检测染色体22q11.2缺失。[35]Digilio MC, Angioni A, De Santis M, et al. Spectrum of clinical variability in familial deletion 22q11.2: from full manifestation to extremely mild clinical anomalies. Clin Genet. 2003;63:308-313.http://www.ncbi.nlm.nih.gov/pubmed/12702165?tool=bestpractice.com
大多数DiGeorge综合征是散发病例,尚无已知危险因素。[9]Botto LD, May K, Fernhoff PM, et al. A population-based study of the 22q11.2 deletion: phenotype, incidence, and contribution to major birth defects in the population. Pediatrics. 2003;112:101-107.http://www.ncbi.nlm.nih.gov/pubmed/12837874?tool=bestpractice.com