Abstract
Introduction
The uncertainty about the morphological classification of the manubriosternal joint is historical in the field of Anatomy and is still under discussion. This makes it difficult to teach and diagnosing related matters, especially those that require radiological images. In fact, this subject lacks specific data.
Purpose
This study aims to describe the morphology of the manubriosternal joint and its age-related changes.
Methods
Thirty specimens were divided in three groups: young adults up to 35 years of age, middle-aged adults ranging from 36 to 55, and older adults over 56 years. The subjects were labeled, and blind analysis were performed using the macroscopic and microscopic analysis.
Results
The large presence of isolated fibroblasts and chondrocytes and the lower degree of isogenic groups proved that the manubriosternal joint is a symphysis. Its age-related changes involve the reduction of thickness and hydrated characteristics, loss of uniformity and arrangement of the collagen fibers, hyalinization and the presence of focal lesions, that corroborate with the degenerative process.
Conclusion
The manubriosternal joint is classified as symphysis and the main age-related changes is the relative thickness of the tissue.
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Acknowledgements
The authors acknowledge the team of Doctors and Technicians of Coroner’s Office of Vitoria, especially Dr. Rogerio Piontkowsky.
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JM Sarcinelli: project development and data collection. R Eustáquio-Silva: project conception and manuscript writing/editing. JS Baptista: project development, data analysis and manuscript writing/editing.
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Sarcinelli, J.M., Eustáquio-Silva, R. & da Silva Baptista, J. Manubriosternal joint: synchondrosis or symphysis? Analysis of morphology and aging in humans. Surg Radiol Anat 41, 275–279 (2019). https://doi.org/10.1007/s00276-018-2154-6
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DOI: https://doi.org/10.1007/s00276-018-2154-6