ArticleAesthetic surgery journal. Open forum2026
Medial vs Central Upper Eyelid Fat: A Histological and Immunohistochemical Study of Structural and Vascular Features.
Article in Aesthetic surgery journal. Open forum, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
10 authors.
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Abstract
Background: The medial upper eyelid fat compartment has long been recognized clinically as being firmer, whiter, and more fibrous than the central preaponeurotic fat. Despite its surgical relevance, systematic quantitative histological characterization remains limited. Objectives: The objective of this study was to quantitatively compare the histological and immunohistochemical characteristics of medial and central upper eyelid fat compartments, with particular focus on connective tissue composition, vascularization, and stromal nuclear density. Methods: In a paired-sample design, medial and central upper eyelid fat compartments were harvested from 10 patients undergoing upper blepharoplasty. Each compartment was analyzed using hematoxylin and eosin (H&E) staining, acid fuchsin + orange G staining, and CD31 immunohistochemistry. Connective tissue proportion, capillary density, and stromal nuclear density were assessed. Results: The medial compartment demonstrated a significantly higher proportion of connective tissue compared with the central compartment (67.74 ± 5.63% vs 56.63 ± 5.56%, Conclusions: The medial upper eyelid fat compartment differs histologically from the central compartment by an increased connective tissue content and reduced vascular and stromal cell density. These findings provide a structural basis for its clinically observed firmness and potentially altered regenerative behavior.
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