The pure gonadal dysgenesis syndrome

Area of Science:

• Reproductive Endocrinology
• Human Genetics
• Pediatric Endocrinology

Background:

• Gonadal dysgenesis (GD) is a disorder affecting sexual development, characterized by absent or incomplete development of the gonads.
• Phenotypic females with GD often present with primary amenorrhea, underdeveloped secondary sex characteristics, and immature reproductive organs.
• Genetic and environmental factors contribute to the pathogenesis of gonadal dysgenesis.

Observation:

• Two cases of gonadal dysgenesis in phenotypic females are presented.
• Patient 1 exhibited primary amenorrhea, tall stature, and underdeveloped secondary sexual characteristics, with a karyotype of 46,XX and a satellite on chromosome 17.
• Patient 2 presented similarly, with a normal female karyotype (46,XX) and a history of mumps, also showing primary amenorrhea and developmental delays.

Findings:

• Laparoscopic bilateral gonadal biopsies in both patients revealed fibrous tissue lacking primordial follicles, confirming gonadal dysgenesis.
• The cases illustrate diverse chromosomal patterns and potential contributing factors, such as viral infections (mumps), in the development of GD.
• Both patients displayed consistent clinical features of underdeveloped reproductive systems and primary amenorrhea.

Implications:

• These cases emphasize the critical need for comprehensive evaluation, including karyotyping and gonadal biopsy, for diagnosing gonadal dysgenesis.
• Understanding the varied etiologies of GD is crucial for effective clinical management and genetic counseling.
• Further research into the pathogenesis and long-term outcomes of gonadal dysgenesis is warranted to improve patient care.