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Related Concept Videos

Classification of Epithelial Tissues: Glandular Epithelium01:20

Classification of Epithelial Tissues: Glandular Epithelium

The glandular epithelium is made of one or more epithelial cells modified to synthesize and secrete chemical substances. Glandular epithelia can be classified based on cell number. Unicellular glands have individual secretory cells scattered across the epithelial monolayer. In contrast, multicellular glands consist of a hollow tubular duct attached to the cluster of secretory cells located in the deep pockets.
Multicellular glands are formed during early development when epithelial budding...
Classification of Epithelial Tissues: Overview01:22

Classification of Epithelial Tissues: Overview

Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...
Classification of Epithelial Tissues: Simple Epithelium01:30

Classification of Epithelial Tissues: Simple Epithelium

Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the function of the tissue. Cells in simple squamous epithelium appear as thin scales with flat, elliptical nuclei that mirror the form of the cell.
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...
Classification of Epithelial Tissues: Stratified Epithelium01:29

Classification of Epithelial Tissues: Stratified Epithelium

Stratified epithelium consists of several stacked layers of cells. They provide the durability to withstand constant physical and chemical attacks. Stratified epithelium is named after the shape of the most apical layer of cells. Stratified squamous epithelium is the most common type found in the human body. In this tissue, the apical cells are squamous, whereas the basal layer contains either columnar or cuboidal cells. The basal cells divide to form new daughter cells, which gradually become...
Metastasis02:30

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Epithelial Tissues and Their Functions01:23

Epithelial Tissues and Their Functions

Epithelial tissues are large sheets of cells covering all of the surfaces of the body. These surfaces can be internal or external, for example, skin, airways, the digestive tract, the urinary system, and the reproductive system. Hollow organs and body cavities that do not connect to the body's exterior, including blood vessels and serous membranes, are lined by epithelial tissue known as the endothelium.
Epithelial tissues provide the body's first line of protection from physical, chemical, and...

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Related Experiment Video

Updated: Jun 7, 2026

Tubal Cytology of the Fallopian Tube as a Promising Tool for Ovarian Cancer Early Detection
08:09

Tubal Cytology of the Fallopian Tube as a Promising Tool for Ovarian Cancer Early Detection

Published on: July 25, 2017

[Epithelioid trophoblastic tumour].

Susanne Eiholm1, Jill Levin Langhoff, Connie Palle

  • 1Roskilde Sygehus, Patologiafdelingen, Denmark. s.eiholm@gmail.com

Ugeskrift for Laeger
|November 3, 2010
PubMed
Summary

Epithelioid trophoblastic tumor, a rare gestational trophoblastic disease, requires accurate diagnosis via morphology and immunohistochemistry. Correctly identifying this tumor ensures appropriate surgical treatment, avoiding ineffective chemotherapy.

Area of Science:

  • Gynecologic Oncology
  • Pathology
  • Reproductive Endocrinology

Background:

  • Epithelioid trophoblastic tumor (ETT) is an uncommon form of gestational trophoblastic disease.
  • Accurate diagnosis is critical due to distinct treatment pathways.
  • ETT necessitates surgical intervention, differentiating it from other trophoblastic neoplasms managed with chemotherapy.

Observation:

  • This report details a specific case of epithelioid trophoblastic tumor.
  • Diagnostic methodologies include detailed microscopic examination and immunohistochemical analysis.
  • Key diagnostic criteria and potential differential diagnoses are presented.

Findings:

  • Microscopic morphology and immunohistochemical profiles are essential for definitive ETT diagnosis.

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Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
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Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

Related Experiment Videos

Last Updated: Jun 7, 2026

Tubal Cytology of the Fallopian Tube as a Promising Tool for Ovarian Cancer Early Detection
08:09

Tubal Cytology of the Fallopian Tube as a Promising Tool for Ovarian Cancer Early Detection

Published on: July 25, 2017

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

  • Distinguishing ETT from other gestational trophoblastic diseases is crucial for therapeutic decisions.
  • The presented case illustrates the diagnostic challenges and features of ETT.
  • Implications:

    • Avoiding misdiagnosis of ETT is paramount to ensure patients receive timely and appropriate surgical management.
    • Enhanced understanding of diagnostic criteria can improve clinical practice and patient outcomes.
    • This case contributes to the literature on rare gestational trophoblastic diseases, aiding future diagnostic efforts.