Assessing sex assignment concordance with genotype and phenotype

Area of Science:

• Endocrinology
• Genetics
• Pediatrics

Background:

• Disorders of Sex Development (DSD) encompass a range of conditions affecting sexual development.
• Accurate sex assignment is crucial for patient management and psychosocial well-being.
• Existing guidelines for DSD management require refinement based on clinical data.

Purpose of the Study:

• To catalogue patients with DSD.
• To assess the concordance between genotype and phenotype with sex assignment at birth versus after Gender Medicine Team (GMT) assessment.
• To inform the development of standardized management guidelines for DSD.

Main Methods:

• Retrospective chart review of 47 patients with confirmed DSD seen at a Gender Medicine Clinic (GMC) between 2006-2009.
• Analysis of sex assignment concordance with genotype and phenotype before and after GMT evaluation.
• Statistical analysis using McNemar's test and Kappa agreement.

Main Results:

• Sex assignment concordance with genotype was 63.8% at birth and improved to 76.6% after GMT assessment.
• Sex assignment concordance with phenotype was 86.4% at birth and improved to 97.7% after GMT assessment.
• A significant portion of patients presented with phenotypic ambiguity or discordant genotype/phenotype.

Conclusions:

• Gender Medicine Team assessment significantly improves sex assignment concordance in DSD patients.
• Further long-term outcome data are necessary for establishing robust clinical practice guidelines.
• Standardized guidelines are essential for consistent and effective DSD management.