The anatomical characteristics of the pyramidal lobe of the thyroid gland: a study on 180 patients

Georgios D. Koimtzis*, Cristoforos S. Kosmidis, Theodosios S. Papavramidis

The anatomical characteristics of the pyramidal lobe of the thyroid gland: a study on 180 patients

Georgios D. Koimtzis*, Cristoforos S. Kosmidis, Theodosios S. Papavramidis

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Georgios D. Koimtzis*, Cristoforos S. Kosmidis, Theodosios S. Papavramidis, “The anatomical characteristics of the pyramidal lobe of the thyroid gland: a study on 180 patients”, ijmhs, vol. 10, no. 04, pp. 902–906, Apr. 2020.

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Abstract

Background
The pyramidal lobe is the most encountered anatomical variation the thyroid gland.
The existence of this lobe can compromise the completeness of total thyroidectomy,
which in turn hinders the effective treatment of malignant and autoimmune thyroid
diseases. The purpose of this study is to analyze the anatomical characteristics of
the thyroid’s gland pyramidal lobe. Knowledge of these traits can help avoid surgical
pitfalls.
Materials and Methods
The features of the pyramidal lobe were studied retrospectively in 180 total thyroidectomy
specimens that were collected between 01/01/2015 and 31/03/2018
Results
The pyramidal lobe was identified in 48.1% of the patients with no significant difference
between genders. It was documented in the histopathologic report in 48.8% of the
patients but only 33.3% (14 cases) had lesions in it, with a single case of malignancy.
The lobe originated from the middle line in 41.8% of the patients, from the left side
of the middle line in 27.9% of the patients and from the right side of the middle line
in another 27.9%. The pyramidal lobe’s length was 3.26 cm.
Conclusions
The pyramidal lobe of the thyroid gland is an anatomical variation that is present
at almost 50% of the cases and when existing, complexes the completeness of total
thyroidectomy. It is the most common cause of incomplete excision and most common
site of recurrence. Therefore, knowledge of its anatomical traits, correct preoperative
evaluation and application of proper tips and tricks is essential in achieving a true
total thyroidectomy.
Key words: thyroidectomy–endocrine surgical procedures–thyroid gland–surgical
procedures minimally invasive

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Issue Vol. 10 No. 04 (2020): Innovative Journal of Medical and Health Science
Section Research Articles

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Innovative Journal of Medical and Health Sciences

The anatomical characteristics of the pyramidal lobe of the thyroid gland: a study on 180 patients

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