Pituitary dysfunction in traumatic brain injury: Is evaluation in the acute phase worthwhile?

Area of Science:

• Endocrinology
• Neuroscience
• Trauma Care

Background:

• Traumatic brain injury (TBI) is an under-recognized cause of hypopituitarism.
• Recent data suggest TBI-induced hypopituitarism may be more prevalent than previously thought.
• There is a notable scarcity of data regarding TBI and hypopituitarism in the Indian population.

Purpose of the Study:

• To determine the prevalence of pituitary hormone deficiencies in the acute phase following TBI.
• To correlate trauma severity with basal pituitary hormone levels.
• To investigate whether initial hormone deficiencies predict mortality in TBI patients.

Main Methods:

• A cohort of 49 TBI patients (41 men, 8 women) was enrolled.
• Pituitary function was assessed within 24 hours of hospital admission.
• Hormone levels were correlated with TBI severity and mortality outcomes.

Main Results:

• Gonadotropin deficiency occurred in 65.3% of patients; 46.9% had low insulin-like growth factor-1.
• Cortisol levels <7 mcg/dl were observed in 12.24% of patients.
• Low free triiodothyronine (fT3) levels were significantly associated with increased mortality risk.

Conclusions:

• Pituitary dysfunction is common post-TBI, with growth hormone and gonadotropin axes most frequently affected.
• Low fT3 levels demonstrate the strongest correlation with mortality after TBI.
• Assessing cortisol levels during the acute phase of TBI is crucial due to the life-threatening risk of undetected deficiency.