Achondroplasia with SRY-positive 46, XX disorder of sex development: an extremely rare association
Du, Yang Timothy
© 2018 The authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
© 2018 The authors
A 40-year-old man with achondroplasia presented with symptoms of hypogonadism, low libido and gynaecomastia. He was found to have hypergonadotropic hypogonadism, and karyotype and fluorescent in situ hybridisation analysis showed SRY-positive 46, XX disorder of sex development (DSD). He was tested to have the common activating mutation of the FGFR3 gene implicated in achondroplasia, indicating that he had the two rare conditions independently, with an extremely low incidence of 1 in 400 million. This, to the best of our knowledge, is the first report of an individual having these two rare conditions concurrently. This case highlights that individuals with achondroplasia should have normal sexual development, and in those presenting with incomplete sexual maturation or symptoms of hypogonadism should prompt further evaluation. We also propose a plausible link between achondroplasia and 46, XX DSD through the intricate interactions between the SRY, SOX9 and FGFR9 gene pathways.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
Du, Y.T., Rutter, A. & Ho, J., (2018). Achondroplasia with SRY-positive 46, XX disorder of sex development: an extremely rare association. Endocrinology, Diabetes and Metabolism Case Reports, 18-0054.