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Related Concept Videos

Electron Orbital Model01:18

Electron Orbital Model

Orbitals are the areas outside of the atomic nucleus where electrons are most likely to reside. They are characterized by different energy levels, shapes, and three-dimensional orientations. The location of electrons is described most generally by a shell or principal energy level, then by a subshell within each shell, and finally, by individual orbitals found within the subshells.The first shell is closest to the nucleus, and it has only one subshell with a single spherical orbital called the...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

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Molecular Orbital Theory I02:35

Molecular Orbital Theory I

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The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...

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Related Experiment Video

Updated: Jun 28, 2026

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography
04:48

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography

Published on: November 30, 2022

[Orbital tumors].

P Papanagiotou1, I Q Grunwald, M Politi

  • 1Klinik für Diagnostische und Interventionelle Neuroradiologie, Universitätsklinikum des Saarlandes, Kirrberger Strasse, 66421 Homburg/Saar. panagiotis_papanagiotou@hotmail.com

Der Radiologe
|November 13, 2008
PubMed
Summary
This summary is machine-generated.

Computed tomography (CT) and magnetic resonance imaging (MRI) are key for diagnosing orbital tumors. This overview details their appearances on CT and MRI, aiding differentiation of similar-looking lesions.

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Three-Dimensional Reconstruction of Orbital Fractures
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Three-Dimensional Reconstruction of Orbital Fractures

Published on: May 16, 2025

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Last Updated: Jun 28, 2026

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography
04:48

Application of Deep Learning-Based Medical Image Segmentation via Orbital Computed Tomography

Published on: November 30, 2022

Three-Dimensional Reconstruction of Orbital Fractures
08:18

Three-Dimensional Reconstruction of Orbital Fractures

Published on: May 16, 2025

Area of Science:

  • Radiology
  • Ophthalmology
  • Oncology

Context:

  • Orbital neoplasms present diagnostic challenges due to overlapping imaging features.
  • Computed tomography (CT) and magnetic resonance imaging (MRI) are the primary imaging modalities for orbital lesion assessment.

Purpose:

  • To provide a comprehensive overview of orbital tumors.
  • To illustrate the characteristic appearances of various orbital tumors on CT and MRI.
  • To aid in differentiating between similar-looking orbital lesions based on radiological features.

Summary:

  • This review covers the spectrum of tumors affecting the eye and orbit.
  • Characteristic radiological features on CT and MRI are presented for each tumor type.
  • Emphasis is placed on distinguishing features to improve diagnostic accuracy.

Impact:

  • Enhances diagnostic capabilities for radiologists and ophthalmologists.
  • Improves the accurate identification of orbital neoplasms.
  • Facilitates better patient management through precise diagnosis.