Keywords : Pyramidal Lobe, thyroidectomy, thyroid anatomy.
Abstract
The Pyramidal Lobe (PL) is a thyroid tissue remnant of embryological origin located in the pretracheal region. Failure to excise the PL during thyroid surgeries will result in incomplete resection and it is important for the surgeon to be aware of its clinical anatomy. We attempt to study the incidence of the PL of the thyroid gland and its anatomical variations. Methods: This prospective study was carried out on 30 cases who underwent Total Thyroidectomy at the Department of ENT in a tertiary care centre in central India between April 2022 to June 2024. The study involved observing and documenting the incidence, anatomical variations in size and location of the PL during thyroid surgery. Results: PL was identified in 12 (40%) patients. PL was seen arising from the isthmus in 9 (75%) study subjects, in 2(16.66%) on right and in 1(8.33%) on left side. The length varied from 14mm to 24mm (mean length of PL 16.9 ± 3.3 mm). Conclusion: The Pyramidal Lobe is a frequently encountered normal anatomical variant of the thyroid gland. Failure to adequately address this anatomical structure may result in incomplete resection of the thyroid gland during surgeries and result in potential consequences such as recurrence or persistence of disease.
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