Neglected aspect of the strategy for human breast diseases: trans-areolar drug delivery
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Updated: May 28, 2026

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Published on: April 1, 2022
Chao Shao1, Aidong Li, Jian Zhang
1Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
Abstract:
Breast cancer is the most common malignancy in women worldwide. Oncoplastic surgery and partial-breast reconstruction have already developed to improve cosmetic outcomes. However, new strategies for breast diseases are still needed. The principles of evolutionary biology and phylogeny can help solve specific medical problems. But the phylogeny of human breast areola had not been researched ever since proposed. The breast areola has a unique phylogeny, it has all different types of skin glands and includes a few hairs towards the periphery. These skin appendages, including Montgomery's glands - whose miniature mammary acini are in the subcutaneous tissue - make the dermal microvascular "sink" phenomenon imperfect, resulting in that more drug molecules can penetrate into deeper tissue. Meanwhile, the wrinkled skin of the areola increases the total delivery area. Here, we emphasize that the human breast areola has the potential to increase transdermal drug delivery to the breast. We anticipate that our hypothesis may help to provide new, optimized therapeutic and prophylactic strategies for the human breast diseases.
Insights
The human breast areola
Area of Science:
- Evolutionary biology
- Phylogeny
- Dermatology
Background:
- Breast cancer is a leading global health concern for women.
- Current breast disease treatments focus on oncoplastic surgery and reconstruction.
- Novel therapeutic strategies for breast diseases are essential.
Purpose of the Study:
- To investigate the evolutionary history and phylogenetic origins of the human breast areola.
- To explore the unique anatomical and physiological characteristics of the areola.
- To assess the potential of the areola for enhancing transdermal drug delivery for breast conditions.
Main Methods:
- Phylogenetic analysis of the human breast areola.
- Histological examination of areolar skin appendages and glands.
- Assessment of dermal microvascular characteristics and drug penetration potential.
Main Results:
- The human breast areola exhibits a unique evolutionary and phylogenetic history.
- Areolar skin possesses diverse glands (e.g., Montgomery's glands) and hair follicles.
- These features create a "sink" phenomenon, facilitating deeper drug penetration and increasing delivery area.
Conclusions:
- The human breast areola's unique structure enhances transdermal drug delivery.
- This finding offers potential for new therapeutic and prophylactic strategies for breast diseases.
- Further research into areolar drug delivery could optimize breast cancer treatment and prevention.
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