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[Polyglandular type I autoimmune syndrome].

K Schmitt¹, G Tulzer, W Tulzer

¹Interne Abteilung Landeskinderklinik, Linz.

Wiener Klinische Wochenschrift

|January 1, 1992

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Two sisters with type I polyglandular autoimmune syndrome (PGA-I) highlight the complex genetic and environmental factors influencing disease development. Autoantibodies confirm autoimmune attack on multiple endocrine glands.

Area of Science:

Endocrinology
Immunology
Genetics

Background:

Type I polyglandular autoimmune syndrome (PGA-I) is a rare autoimmune disorder affecting multiple endocrine glands.
Genetic predisposition, often linked to HLA associations, is implicated in PGA-I development.

Observation:

Two HLA-identical sisters presented with PGA-I over 12 years.
Both sisters developed hypoparathyroidism and Addison's disease.
One sister also developed diabetes mellitus, hypergonadotropic hypogonadism, and hypothyroidism.

Findings:

Autoantibodies against adrenal, parathyroid, and thyroid glands were present in both patients.
Antinuclear antibodies were also detected.
HLA associations, previously reported for PGA-I, were not confirmed in these cases.

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Implications:

Despite sharing identical HLA genes, the sisters exhibited different clinical manifestations of PGA-I.
This suggests that factors beyond HLA genetics, such as additional genetic or environmental influences, are crucial for disease expression.
The disease-causing gene's linkage to the HLA region may not be very close, necessitating further research into PGA-I's genetic architecture.