hrp0095p1-181 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Monoallelic variants in Myelin Regulatory Factor (MYRF) associated with 46,XY DSD – two cases and first report of inheritance through parental mosaicism

Kaninde Abhidhamma , Chandran Harish , McCarthy Liam , Ghose Arun , Ellis David , Fulton Piers , Vogt Julie , Igbokwe Rebecca , Jeremy Kirk Jeremy , Mohammed Zainaba , Idkowiak Jan

Background: Haplo-insufficiency of the Myelin-Regulatory Factor (MYRF) gene causes cardiac-urogenital syndrome (CUGS) and Differences in Sexual Development (DSD) in 46,XY and 46,XX (OMIM #618280). The gene product, a transcription factor, is involved in development of Coelomic epithelium derived cells, and likely causative for DSD. To date, only a few MYRF de novo variants are reported in children with DSD and associated CUGS symptoms.<s...

hrp0095p1-574 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Phenotype-genotype characteristics of SRD5A2 with variation in gender choice among affected individuals: A single centre experience

Kaninde Abhidhamma , Baranowski Elizabeth , Igbowke Rebecca , McCarthy Liam , Chandran Harish , Vandermerwe Elmarie , Fulton Piers , Godber Caroline , Smart Helen , Curtis Joanne , Cole Trevor , Gleeson Helena , Latthe Pallavi , Kirk Jeremy , Idkowiak Jan , Mohamed Zainaba

Background: 5α-reductase type 2 deficiency (SRD5A2) is a rare cause of 46,XY DSD. Consensus guidelines on sex of rearing assignment at birth favours male gender. Typically undervirilised genitalia at birth virilise variably at puberty, posing gender identity challenges.Aim: We describe relevant data on clinical phenotype, hormonal and molecular workup and gender preference in patients with SRD5A2 deficiency from a ...