Clinical characteristics of 1,055 Chinese patients with Mayer-Rokitansky-Küster-Hauser syndrome: a nationwide multicentric study.

<bold>Objective: </bold>To reveal the proportion of concomitant extragenital malformations in a large cohort of Chinese patients with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome.<bold>Study Design: </bold>Retrospective study.<bold>Setting: </bold>Tertiary teaching hospitals in China.<bold>Patient(s): </bold>A total of 1,055 Chinese Han women with MRKH syndrome diagnosed and treated at 11 Chinese tertiary teaching hospitals from January 2015 to January 2020.<bold>Intervention(s): </bold>Karyotype analysis, hormone profiling, pelvic ultrasonography, spinal roentgenograms, urologic ultrasonography, and Chinese female reproductive tract malformation registry platform (https://ecrf.linklab.com/).<bold>Main Outcome Measure(s): </bold>Patients' demographic and clinical characteristics, concurrent malformations, and family histories.<bold>Result(s): </bold>Of the 1,055 Chinese Han patients with MRKH, 69.6% had type I MRKH syndrome and the remaining 30.4% had type II MRKH syndrome. Among the type II patients, 12.6% had müllerian duct aplasia, unilateral renal aplasia/ectopic kidney, and cervicothoracic somite dysplasia association. Skeletal malformations were the most common associated extragenital malformations in the study (22.0%, 232/1,055), of which idiopathic scoliosis and congenital vertebral malformations were the 2 main skeletal malformations (80.6% and 14.2%, respectively). Renal malformations were the second-highest associated extragenital malformations (9.7%, 102/1,055), with unilateral renal agenesis and ectopic kidney being the most common renal malformations (48.0% and 22.5%, respectively).<bold>Conclusion(s): </bold>Type II disease was less common among Chinese patients with MRKH syndrome compared with European patients. Skeletal malformations were more common extragenital malformations than renal malformations in our cohort. [ABSTRACT FROM AUTHOR]