Turner syndrome: contemporary thoughts and reproductive issues

Area of Science:

• Genetics and Endocrinology
• Reproductive Medicine
• Cardiovascular Health

Background:

• Turner syndrome, often characterized by a 45,X karyotype, involves X-chromosomal abnormalities and mosaicism.
• Affected individuals exhibit variable phenotypes and are susceptible to endocrine, autoimmune, and structural complications.
• Specific risks include ascending aortic dissection/rupture and primary ovarian insufficiency (POI).

Purpose of the Study:

• To clarify the risks associated with Turner syndrome, particularly aortic rupture and reproductive outcomes.
• To address the clinical implications of using the term Primary Ovarian Insufficiency (POI) for Turner syndrome patients.
• To emphasize the need for accurate counseling regarding fertility and pregnancy risks.

Main Methods:

• Literature review and analysis of clinical data pertaining to Turner syndrome.
• Comparison of reproductive potential and risks between Turner syndrome and 46,XX POI.
• Evaluation of aortic dissection/rupture incidence and risk factors in Turner syndrome.

Main Results:

• Up to 1.5% of Turner syndrome patients may experience aortic dissection/rupture, with risk factors including cardiac abnormalities and hypertension, though their absence does not preclude rupture.
• 5% or more of women with Turner syndrome develop amenorrhea and hypergonadotropic hypogonadism.
• Pregnancy, spontaneous or via donor oocyte, increases maternal mortality by at least 100-fold; spontaneous pregnancy in amenorrheic Turner syndrome patients with ovarian failure is exceedingly rare.

Conclusions:

• Turner syndrome patients are at significant risk for aortic rupture, independent of certain clinical signs.
• The term Primary Ovarian Insufficiency (POI) may be misleading for Turner syndrome patients, as they typically have complete ovarian failure, unlike 46,XX POI patients.
• Honest and thorough counseling is crucial for Turner syndrome patients regarding their unique reproductive risks and prognosis.