Three-dimensional magnetic resonance-based morphometry of pituitary stalk

Area of Science:

• Radiology
• Neuroimaging
• Endocrinology

Background:

• The pituitary stalk is crucial for evaluating pituitary and suprasellar lesions.
• Current normative data for pituitary stalk morphometry are insufficient, especially in adults.

Purpose of the Study:

• To establish normative data for pituitary stalk length, thickness, and infundibular recess depth in adults.
• To provide reference values for diagnosing infundibular lesions and assessing treatment efficacy.

Main Methods:

• Analysis of 150 normal adult brain MRI scans (75 male, 75 female).
• Measurement of pituitary stalk length, diameter at the optic chiasma, and infundibular depth.
• Statistical analysis including unpaired t-tests and intraclass correlation coefficients.

Main Results:

• Mean pituitary stalk length was 0.55 ± 0.16 mm, with significant gender differences (p < 0.05).
• Mean stalk diameter at the optic chiasma was 0.24 ± 0.06 mm.
• Mean infundibular depth was 0.52 ± 0.12 mm, with no significant gender differences in thickness or depth.

Conclusions:

• The established normative data serve as a screening tool for diagnosing pituitary infundibular lesions.
• These data assist in evaluating treatment effects and managing hypothalamo-pituitary axis diseases.
• Findings support radiologists and endocrinologists in early diagnosis and patient management.