Pituitary dysfunction after traumatic brain injury: a clinical and pathophysiological approach

Area of Science:

• Neuroendocrinology
• Neurology
• Public Health

Background:

• Traumatic brain injury (TBI) is a significant global health issue, leading to death and disability.
• Pituitary dysfunction following TBI, including hypopituitarism, has been increasingly recognized.
• The incidence of hypopituitarism after TBI varies widely, reported between 15-50% in different studies.

Purpose of the Study:

• To review current data on anterior pituitary dysfunction in adult TBI patients.
• To provide updated guidelines for diagnosis, follow-up, and treatment of hypopituitarism post-TBI.
• To explore the impact of hypopituitarism on functional recovery and cognition after TBI.

Main Methods:

• Review of existing literature on TBI and neuroendocrine dysfunction.
• Analysis of studies investigating pituitary function in TBI survivors.
• Synthesis of diagnostic and therapeutic guidelines for hypopituitarism.

Main Results:

• Growth hormone (GH) deficiency is the most common, followed by ACTH, gonadotropins (FSH/LH), and TSH deficiencies.
• Persistent hypopituitarism rates decrease to 12% with repeated testing.
• Potential roles of genetic predisposition and autoimmunity in TBI-induced pituitary dysfunction are suggested.

Conclusions:

• Hypopituitarism is a common complication of TBI with potential negative effects on recovery.
• Further research is needed to clarify the mechanisms and the benefits of treating hypopituitarism after TBI.
• Updated guidelines for managing pituitary dysfunction in TBI patients are essential.