McCune-Albright综合征1例诊治及基因突变分析

目的分析1例McCune-Albright综合征患者的临床特点、诊治及基因突变,提高对本病的认识。方法对1例以阴道出血和双乳增大为初诊表现的女童,进行体格检查,分析及完善其各项检验结果包括促性腺激素释放激素(GnRH)刺激试验、骨龄检查、X线片及子宫卵巢B超等。提取患儿及其父母外周血白细胞基因组DNA,PCR扩增鸟嘌呤核苷酸结合蛋白α亚基基因(GNAS1)8、9号外显子及侧翼序列后测序,确定是否存在突变位点。应用选择性雌激素受体调节剂他莫昔芬治疗。结果患儿外周血基因突变分析结果为阴性,但根据该病例出现的典型纤维性骨发育不良、皮肤咖啡牛奶色素斑和非促性腺激素依赖性性早熟特征确诊为McCune-Albright综合征。他莫昔芬治疗1a,不能有效抑制其生长发育和骨龄的迅速进展及雌激素水平(黄体生成素、卵泡刺激素、雌二醇),子宫卵巢稍增大,且下肢长骨病变进一步恶化。结论McCune-Albright综合征的诊断以临床特征为主要依据,外周血GNAS1基因突变分析结果为阴性不能排除其余组织突变的存在。如能获取病变部位组织如病损骨、色素沉着皮肤等DNA样本进行基因分析,可能对诊断有一定的帮助。临床中出现非促性腺激素依赖性性...

Diagnosis,Management and Gene Mutation Analysis of One Patient with McCune-Albright Syndrome

Objective To analyze the clinical characteristics,diagnosis and management of a patient with McCune-Albright syndrome and perform the stimulatary G-protein alpha subunit(GNAS1) gene mutation analysis.Methods A girl initially presented with vaginal bleeding and bilateral breast development was selected in this study.Physical examinations were carefully done.Gonadotropin releasing hormone(GnRH) stimulation test,bone age,X rays and ultrasound of pelvic were completed.Genomic DNA in the peripheral blood leucocy...