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Pituitary fossa volume in primary hypothyroidism
Summary
Pituitary enlargement is common in primary hypothyroidism. High thyrotropin (TSH) levels correlate with pituitary size, and normalizing TSH may prevent cell hypertrophy.
Area of Science:
- Endocrinology
- Neuroendocrinology
- Internal Medicine
Background:
- Primary hypothyroidism can lead to pituitary gland changes.
- Thyroid hormone deficiency stimulates the pituitary to produce more thyrotropin (TSH).
Purpose of the Study:
- To investigate the relationship between pituitary volume and primary hypothyroidism.
- To determine the correlation between serum TSH levels and pituitary enlargement.
Main Methods:
- Pituitary volume was determined in 20 patients with primary hypothyroidism.
- Serum TSH levels were measured and correlated with pituitary fossa dimensions.
Main Results:
- Pituitary fossa enlargement was observed in 25% of patients.
- A strong correlation was found between the highest serum TSH levels and pituitary enlargement.
Conclusions:
- Pituitary enlargement is a potential consequence of untreated primary hypothyroidism.
- Maintaining normalized TSH levels is crucial for preventing thyrotropic cell hypertrophy and pituitary enlargement.