LAUSR

Background Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is mainly characterized by congenital aplasia of the uterus and the upper two-thirds of the vagina in females with normal secondary sex characteristics and female karyotype (46,XX). MRKH syndrome is typically diagnosed due to primary amenorrhea in adolescence and is very difficult to diagnose in childhood. MRKH syndrome combined with central precocious puberty (CPP) is extremely rare. In this article, we report a case of MRKH syndrome with idiopathic CPP (ICPP). Case Description A 7-year-old girl was presented with development of bilateral breasts for 1 year and relatively low body height. Based on her age, clinical signs, and laboratory findings, she was initially diagnosed with ICPP and treated with sustained-release gonadotropin-releasing hormone analog (GnRHa) therapy, and recombinant human growth hormone (rhGH) therapy from the 6th month onwards. During the follow-up, ultrasound and magnetic resonance imaging showed no uterus or uterine neck, an unclear vaginal structure, and normal ovaries. Her chromosome karyotype was 46,XX. A pediatric gynecological examination showed colpatresia. She was finally diagnosed with MRKH syndrome combined with CPP. After the GnRHa and rhGH treatment, her height became normal compared to her peers, and her bone age development was delayed. Conclusions The present case suggests the possibility of concomitant CPP in patients with MRKH syndrome. The gonads and sexual organs of children with precocious puberty should be carefully monitored and assessed to exclude any sexual organ disorders.