Implications of Ehlers-Danlos Syndrome in a Patient With Mayer-Rokitansky-Küster-Hauser Syndrome

Ehlers-Danlos syndromes (EDS) are a heterogenous group of connective tissue disorders characterized by defective collagen production. Patients with EDS have lax and fragile connective tissue in their joints, skin, blood vessels, and hollow organs. This can lead to, among other complications, joint hypermobility, aneurysms, organ prolapse, and musculoskeletal chronic pain. Given that patients with vaginal agenesis, which occurs with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, often require vaginal dilation as part of their treatment, tissue elasticity and fragility are important considerations. This case report aims to describe the intersection of MRKH and EDS and its impact on vaginal dilation.

A 16-year-old girl with joint hypermobility and type III EDS presented with primary amenorrhea and a karyotype of 46 XX. Magnetic resonance imaging confirmed an absent uterus, cervix, and upper vagina. Physical examination showed Tanner V breasts and Tanner IV pubic hair, and an external genital examination revealed a blind-ending, 1-cm vaginal dimple. The patient was diagnosed with MRKH. Following her diagnosis, she received vaginal dilation instruction and returned for follow-up 2 months later, having quickly progressed to the largest vaginal dilator without symptoms of bleeding, pain, or dysuria. In that timeframe, her vaginal dimple had increased from 1 cm to 7-8 cm in depth, a rate much faster than is typically seen. Because of this rapid progress, a urogenital examination was performed. There was no evidence of urethral abnormality, perforation, or vaginal prolapse.

Recognition of EDS in patients with Müllerian anomalies has important implications for safe and effective vaginal dilation. All patients using vaginal dilation to lengthen the vagina require education on the technique. This need is heightened in patients with EDS in order to prevent accidental dilation of the urethra due to their tissue elasticity, to avoid tissue prolapse, and to prevent the theoretical risk of vaginal perforation.