Lymphocytic hypophysitis: a rare or underestimated disease?

Area of Science:

• Endocrinology
• Autoimmune Diseases
• Neuroendocrinology

Background:

• Lymphocytic hypophysitis (LYH) is an uncommon autoimmune condition affecting the pituitary gland.
• It often presents in women, particularly during pregnancy or postpartum, with symptoms like hyperprolactinemia, headache, and visual disturbances.
• Hormonal imbalances, especially ACTH deficiency, can lead to life-threatening adrenal insufficiency.

Purpose of the Study:

• To describe the clinical presentation, diagnostic findings, and management of lymphocytic hypophysitis.
• To highlight the importance of suspecting LYH in specific patient populations.
• To review the histopathological and imaging characteristics of the disease.

Main Methods:

• Review of clinical cases and literature on lymphocytic hypophysitis.
• Analysis of histopathological findings from pituitary biopsies.
• Evaluation of imaging characteristics, including MRI with gadolinium enhancement.
• Assessment of hormonal profiles and antibody detection.

Main Results:

• LYH involves pituitary infiltration by lymphocytes, plasma cells, and macrophages, leading to impaired function.
• Characteristic MRI findings include sellar depression and extrasellar pituitary enlargement with dural enhancement.
• ACTH deficiency is a common early sign, potentially causing acute adrenal insufficiency.

Conclusions:

• LYH requires high clinical suspicion, especially in women with relevant symptoms and autoimmune history.
• Prompt diagnosis and a multimodal treatment approach, including immunosuppression, hormone replacement, and surgery if needed, are essential.
• Careful follow-up is necessary due to the possibility of spontaneous remission.