What Autoimmune Diseases Are Linked to Turner Syndrome?

Turner syndrome (TS) is linked to a significantly higher risk of developing specific autoimmune diseases and metabolic issues throughout life ^[1][2]. The most common conditions include Hashimoto’s thyroiditis (which causes hypothyroidism), celiac disease, impaired glucose tolerance (which increases Type 2 diabetes risk), abnormal cholesterol, and liver enzyme abnormalities ^[3][4][5]. Because these conditions often develop without obvious symptoms, comprehensive care for Turner syndrome requires lifelong, routine bloodwork to catch them early ^[6][7]. It is important to know that when found early, many of these conditions—such as hypothyroidism—are highly manageable with straightforward daily treatments.

Autoimmune Conditions

Individuals with Turner syndrome have an increased likelihood of their immune system mistakenly attacking healthy tissues ^[8].

Hashimoto’s Thyroiditis (Hypothyroidism)
This is the most frequent autoimmune issue linked to Turner syndrome ^[7]. The immune system attacks the thyroid gland, which can lead to an underactive thyroid, known as hypothyroidism ^[6]. While symptoms can include fatigue, feeling cold, and unexplained weight gain, routine screening can identify thyroid issues before these symptoms become noticeable ^[7].

Celiac Disease
Celiac disease is a condition where eating gluten triggers an immune response that damages the small intestine, and it is more frequently seen in women and girls with TS ^[3][8]. It can cause stomach pain, diarrhea, and nutrient deficiencies, though some individuals may not experience classic gastrointestinal symptoms ^[8]. Note: You must be actively eating gluten when the blood test is drawn for it to be accurate.

Metabolic and Liver Health

Metabolic health, including cholesterol levels and liver function, is also frequently impacted by Turner syndrome ^[4][3][5].

Insulin Resistance and Type 2 Diabetes
Many individuals with Turner syndrome experience impaired glucose tolerance and insulin resistance, which increases the risk of developing Type 2 diabetes ^[4][9]. This means the body struggles to process sugars properly. While some of this risk is tied to the genetics of TS, maintaining a balanced diet and regular physical activity can help support your metabolic health ^[10]. Monitoring glucose metabolism is an important component of ongoing TS management ^[11].

Cholesterol (Dyslipidemia)
Abnormal cholesterol or lipid levels (dyslipidemia) are common metabolic risks in Turner syndrome, contributing to a higher risk of cardiovascular issues ^[5]. Monitoring these levels is an important part of routine care to protect heart health ^[5][10].

Liver Enzyme Abnormalities
Liver and gastrointestinal diseases, including elevated liver enzymes, are frequently observed in women with Turner syndrome ^[3]. These changes often do not cause any physical symptoms but can indicate underlying liver issues that need monitoring ^[3].

Standard Routine Screening Guidelines

To protect long-term health, current medical consensus recommends specific routine blood tests for individuals with Turner syndrome. Because you may see multiple specialists, it is helpful to ask one doctor (usually your endocrinologist or primary care physician) to act as the “coordinator” for your annual TS lab work.

• Annual Thyroid Check: A TSH (thyroid-stimulating hormone) test should be done every year to monitor for hypothyroidism ^[6][7].
• Annual Diabetes Screening: An annual check of fasting blood sugar and HbA1c is advised. Additionally, an oral glucose tolerance test (OGTT)—which involves fasting, drinking a sugary solution, and having blood drawn over a period of time—is considered more sensitive for early diagnosis in Turner syndrome and may be recommended periodically or if initial tests are borderline ^[11].
• Liver Function Tests: Blood tests to monitor liver enzymes (such as ALT and AST) should be done annually ^[3].
• Cholesterol: A fasting lipid panel should be checked regularly, often annually for adults, to monitor for dyslipidemia and protect heart health ^[5][10].
• Celiac Disease Screening: Regular screening for celiac antibodies (like tTG-IgA) is recommended every 2 to 5 years, or sooner if any digestive symptoms or unexplained nutritional deficiencies appear ^[3][8]. Because individuals with Turner syndrome have higher rates of IgA deficiency, a “total serum IgA” test should be run alongside the tTG-IgA to ensure the results are accurate and not false negatives.