Determination of normal intracranial parameters of the sellar region in healthy subjects of South Indian population

Background: The sellar region houses critical neurovascular structures, and anatomical variations influence surgical outcomes. This study aimed to establish normal intracranial parameters (intercarotid distance, pituitary fossa width, optic chiasm dimensions, and pituitary-to-chiasm distance) in the South Indian population.Methods: A retrospective analysis of 100 MRI scans (54 males, 46 females; aged 10-80 years) was conducted. Measurements were obtained using T2-weighted coronal and T1-weighted sagittal sequences. Statistical analysis included mean, standard deviation, and ANOVA.Results: Mean values were: intercarotid distance (16.1±3.8 mm), pituitary width (12.2±2.4 mm), optic chiasm width (13.2±1.5 mm), height (2.17±2.6 mm), and pituitary-to-chiasm distance (5.5±1.85 mm). Males exhibited significantly larger pituitary width (p0.05).Conclusion: This study provides normative data for South Indians, aiding preoperative planning and diagnostic accuracy in sellar pathologies.