Human heel fat pad development before birth
Luis Herrera1, Luis Alfonso Arráez2, Laura Flores3
1Department of Radiology, Fundación Jiménez Díaz University Hospital, Madrid, Spain.
Differentiation; Research in Biological Diversity
|June 3, 2026
Summary
The human heel fat pad (HHFP) develops in distinct stages, with compartmentalization preceding adipocyte maturation. This study reveals key developmental weeks for understanding congenital foot abnormalities.
Area of Science:
- Embryology
- Anatomy
- Histology
Background:
- The prenatal structure of the human heel fat pad (HHFP) is not well understood.
- HHFP is crucial for foot development and related disorders.
- It features a honeycomb-like architecture with micro/macro chambers in adipose tissue.
Purpose of the Study:
- To characterize the histological and morphometric development of the HHFP.
- To emphasize compartmentalization and layer-specific maturation.
- To identify developmental weeks relevant to congenital abnormalities.
Main Methods:
- Analysis of embryonic and fetal specimens (8-34 gestational weeks).
- Inclusion of specimens with preserved anatomical integrity and no malformations.
- Histological and morphometric analysis of HHFP development stages.
Main Results:
- HHFP development classified into three stages (A, B, C) based on structural organization and horizontal fibrous band (HFB) formation.
- Compartmentalization into superficial subcutaneous microchambers (SSM) and deep subcutaneous macrochambers (DSM) observed in Stage B.
- Progressive increase in HHFP thickness, with DSM showing greater thickness and adipocyte diameter than SSM.
Conclusions:
- HHFP development shows rapid growth between weeks 14-17.
- Compartmentalization precedes adipocyte maturation in a layer-dependent manner.
- This study provides a structural framework for prenatal HHFP organization, advancing adipose tissue development models.
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