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Related Experiment Videos

The pyramidal lobe: a scintigraphic assessment.

Q H Siraj1, N Aleem, A Inam-Ur-Rehman

  • 1Armed Forces Institute of Pathology, Rawalpindi, Pakistan.

Nuclear Medicine Communications
|September 1, 1989
PubMed
Summary

The pyramidal lobe (PL) was detected in 41% of thyroid scintigraphs, with higher incidence in females. Its anatomical origin and scintigraphic detection are detailed, noting variations in location and size.

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Area of Science:

  • Medical Imaging
  • Anatomy
  • Endocrinology

Background:

  • The pyramidal lobe (PL) is a known anatomical variant of the thyroid gland.
  • Understanding its prevalence and anatomical variations is crucial for accurate thyroid imaging interpretation.

Purpose of the Study:

  • To investigate the anatomical origin of the pyramidal lobe (PL).
  • To determine the incidence of scintigraphic detection of the PL.
  • To analyze the location and characteristics of the PL on thyroid scintigraphy.

Main Methods:

  • Retrospective analysis of thyroid scintigraphs from 207 patients.
  • Evaluation of the incidence and anatomical origin of the pyramidal lobe.
  • Assessment of PL location relative to the thyroid isthmus and lobes.

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Main Results:

  • The PL was visualized in 41% of cases, with a higher incidence in females.
  • The PL originated equally from the thyroid isthmus or lobes.
  • Isthmal PLs were typically midline, often deviating leftward; visualization increased with gland size but was difficult in large goiters.

Conclusions:

  • Thyroid scintigraphy is valuable for detecting the pyramidal lobe and assessing its anatomical variations.
  • While overlying tissue can cause discrepancies, scintigraphic findings generally reflect the true location of the PL.
  • The study provides insights into the prevalence and anatomical characteristics of the PL, aiding in diagnostic accuracy.