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Related Concept Videos

Indeterminate Products01:29

Indeterminate Products

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Indeterminate forms also arise in the evaluation of limits involving products, particularly when one factor approaches zero while the other tends to positive or negative infinity. This situation, commonly described as a zero-times-infinity form, does not have an immediately interpretable outcome. Depending on how the factors behave relative to one another, the limit of such a product may be zero, infinite, or a finite nonzero value.Product Limits and Algebraic RewritingTo analyze limits of this...
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Indeterminate Structure01:18

Indeterminate Structure

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Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
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Statically Indeterminate Problem Solving01:16

Statically Indeterminate Problem Solving

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Statically indeterminate problems are those where statics alone can not determine the internal forces or reactions. Consider a structure comprising two cylindrical rods made of steel and brass. These rods are joined at point B and restrained by rigid supports at points A and C. Now, the reactions at points A and C and the deflection at point B are to be determined. This rod structure is classified as statically indeterminate as the structure has more supports than are necessary for maintaining...
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Indeterminate Forms and L’Hôpital’s Rule01:27

Indeterminate Forms and L’Hôpital’s Rule

129
Indeterminate forms occur when evaluating limits leads to expressions that cannot be directly interpreted, such as zero divided by zero or infinity divided by infinity. These results do not describe the true behavior of a function near a given point and instead signal that additional analysis is required. L’Hôpital’s Rule provides a reliable method for resolving such ambiguities by replacing the original functions with their derivatives.Core Idea of L’Hôpital’s...
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The Thyroid Gland01:23

The Thyroid Gland

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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
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Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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A Swin Transformer-Based Model for Thyroid Nodule Detection in Ultrasound Images
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Indeterminate Thyroid Nodules: A Pragmatic Approach.

Aly Bernard Khalil1, Roberto Dina2, Karim Meeran2

  • 1Imperial College London Diabetes Center, Abu Dhabi, United Arab Emirates.

European Thyroid Journal
|March 30, 2018
PubMed
Summary
This summary is machine-generated.

The prevalence of indeterminate (Thy3) thyroid nodules in the UAE is 7%, with a 20% malignancy risk. Utilizing ultrasonography risk stratification can significantly reduce unnecessary surgeries for these thyroid nodules.

Keywords:
Fine needle aspiration of the thyroidThyroid noduleUltrasound of the thyroidUltrasound risk stratification

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Area of Science:

  • Endocrinology
  • Cytopathology
  • Oncology

Background:

  • Fine needle aspiration (FNA) cytology is crucial for thyroid nodule diagnosis.
  • A subset of thyroid nodules are classified as "indeterminate" (Thy3), requiring further investigation.
  • The prevalence of Thy3 thyroid nodules in the United Arab Emirates (UAE) population was previously unreported.

Purpose of the Study:

  • To determine the prevalence of Thy3 thyroid nodules in residents of the UAE.
  • To assess the risk of malignancy in the indeterminate Thy3 category within this population.
  • To evaluate the potential impact of ultrasonography (US) risk stratification on surgical referrals.

Main Methods:

  • Retrospective analysis of 688 thyroid FNA samples from 584 patients.
  • Classification of samples using the Royal College of Physicians' (RCP) Thy system.
  • Correlation of FNA results with surgical specimens and application of US risk stratification using a web-based calculator.

Main Results:

  • Overall sample adequacy was 97%.
  • The indeterminate Thy3 category accounted for 7% of samples, with an overall malignancy risk of 20%.
  • US risk stratification could potentially reduce surgical referrals from 61% to 43% by identifying nodules with a 100% negative predictive value when US scoring is <24.5%.

Conclusions:

  • Accurate risk stratification of Thy3 thyroid lesions is essential.
  • A combined assessment of clinical, cytological, radiological, and molecular data improves diagnostic accuracy.
  • Implementing a pragmatic risk stratification approach can decrease unnecessary surgical interventions for thyroid nodules.