International Journal of Health Sciences and Research

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Original Research Article

Year: 2018 | Month: June | Volume: 8 | Issue: 6 | Pages: 56-59

Pyramidal Lobe: Existence and Role in Subtotal Thyroidectomy

Elghazaly A. Elghazaly

Department of Human Anatomy, Faculty of Medicine, University of AL.Baha. KSA


The presences, position, extend and size of the pyramidal lobe of the thyroid gland was postmortem studied in 65 dissected cadaver neck specimens. The aim of this study is to study the anatomical relationship of the pyramidal lobe to the neck structures, and its clinical significance relevant to thyroid surgery. The pyramidal lobe was found in 55.4% of cases as a single projection extends upwards from the thyroid tissue, more common in males, and usually being situated on the left side of the isthmus of thyroid gland. The shape, size, position and extend of the pyramidal lobe was varied; depending on the presences of a fibrous or muscular band that may represent a remnant of the thyroglossal duct during the development of the thyroid gland. The dissection study of the pyramidal lobe shows more results than the imaging one, and most of pyramidal in dissection study were appeared connected superiorly by fibrous connective tissue, this indicates the anatomical and surgical importance of this structure in clinical practice of thyroid surgery. While dissection showed more results, we believed that our data can be used to perform safer and more effective of partial thyroidectomy in order to preserve thyroid function after surgical treatment.

Key words: thyroidectomy, pyramidal lobe, anatomy of the thyroid gland.

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