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Anatomical and Histological Evaluation of the Retroauricular Fascia Flap for Staged Auricular Reconstruction

  • Original Article
  • Basic Science/Experimental
  • Published:
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Abstract

Objectives

The retroauricular fascia flap (RFF) is one of the most commonly used vascularized linings for auriculocephalic sulcus reconstruction in staged total auricular reconstruction. This study aims to investigate the histomorphometric features regarding the retroauricular fascia.

Methods

Histological evaluation included qualitative observation and quantitative analysis of sections of RFF stained with hematoxylin and eosin, Masson’s trichrome, Elastica van Gieson, CD31, and Lyve-1. Ultrasonographic evaluation included measurement of the thickness of the superficial layer of the retroauricular fascia (RFF origin) at three different positions in microtia patients. P < 0.05 was considered statistically significant.

Results

RFF was a thin, highly organized layer with mainly collagen fibers. From its superior to inferior portions, the percentage of collagen fibers differed significantly (superior 87.57 ± 10.85%, middle 68.29 ± 29.02%, inferior 53.31 ± 33.33%, p < 0.05). The percentages of elastic fibers in the superior (4.86 ± 5.17%) and middle (5.05 ± 5.37%) areas were higher than that in the inferior (2.14 ± 2.42%, p < 0.05). RFF blood vessel density (20× magnification) decreased significantly from the superior to inferior portions (superior 6.39 ± 1.18, middle 5.17 ± 1.15, inferior 2.67 ± 0.78, p < 0.05). Lymphatic vessel density (20× magnification) also decreased significantly from the superior to inferior regions (superior 6.80 ± 0.62, middle 5.26 ± 1.17, inferior 2.11 ± 0.46, p < 0.05). Thickness of the superficial layer of retroauricular fascia increased significantly from the superior to inferior regions (superior 0.29 ± 0.06 mm, middle 0.36 ± 0.09 mm, inferior 0.53 ± 0.14 mm, p < 0.001).

Conclusions

From cranial to caudal, the RFF became thicker, less elastic, and less vascularized, and contained fewer lymphatic vessels. Therefore, when the retroauricular fascia is large enough, the superior portion would be preferred for RFF in auriculocephalic sulcus reconstruction.

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Author notes

  1. Yiyuan Li and Chunxiao Cui have contributed equally to this work.

Authors and Affiliations

  1. Department of Plastic and Reconstructive Surgery, Shanghai 9th People’s Hospital, Shanghai JiaoTong University School of Medicine, No. 639, Zhi Zao Ju Rd., Shanghai, 200011, China

    Yiyuan Li, Chunxiao Cui, Ruhong Zhang, Qun Zhang, Zhicheng Xu, Feng Xu & Datao Li

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  1. Yiyuan Li
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  2. Chunxiao Cui
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  3. Ruhong Zhang
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  4. Qun Zhang
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  6. Feng Xu
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Correspondence to Ruhong Zhang.

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Authors declare that they have no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Li, Y., Cui, C., Zhang, R. et al. Anatomical and Histological Evaluation of the Retroauricular Fascia Flap for Staged Auricular Reconstruction. Aesth Plast Surg 42, 625–632 (2018). https://doi.org/10.1007/s00266-018-1098-x

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  • DOI: https://doi.org/10.1007/s00266-018-1098-x

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