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Related Concept Videos

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,...
Vagina01:26

Vagina

The vaginal canal is a tubular structure averaging about 10 cm in length that acts as the entryway to the female reproductive system and the passageway for menstrual flow and childbirth. The interior walls of the vagina exhibit concentric folds called rugae and are topped by an area known as the fornix, which connects with the protruding cervical portion of the uterus. This canal is comprised of an external fibrous layer, a muscular middle layer, and an inner lining with mucosal rugae, which...
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...
Histology of the Uterus01:19

Histology of the Uterus

The uterine wall consists of three histological layers: the perimetrium, myometrium, and endometrium. The outermost perimetrium is a thin, serous membrane connected with the broad ligament on the sides, which helps anchor the uterus in the pelvic cavity. The thickest layer, myometrium, is mainly made up of smooth muscle tissue bundles. Its contractions are vital in facilitating the expulsion of the uterine lining, fetus, and placenta during menstruation and childbirth.
The endometrium is the...
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...
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...

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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
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A simplified classification for describing colposcopic vaginal patterns.

Ugo Indraccolo1, Angelo Baldoni

  • 1Department of Surgical Sciences, University of Foggia, Foggia, Italy. ugo.indraccolo@libero.it

Journal of Lower Genital Tract Disease
|January 10, 2012
PubMed
Summary

Vaginal colposcopy patterns are not specific for lesion severity. A simplified classification of vaginal colposcopy, grouping white and vascular epithelia, improves accuracy without compromising results for detecting warts and cancers.

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Area of Science:

  • Gynecologic Oncology
  • Colposcopy
  • Vaginal Pathology

Background:

  • Colposcopic patterns of the vagina are often non-specific.
  • Existing classifications may not accurately predict lesion severity.

Purpose of the Study:

  • To demonstrate that vaginal colposcopic patterns lack specificity.
  • To propose a simplified classification for vaginal colposcopic patterns.

Main Methods:

  • Retrospective analysis of 223 patients undergoing colposcopy with Schiller test.
  • Hierarchical log-linear modeling was employed.

Main Results:

  • Colposcopic patterns for warts and cancers are highly predictive of these conditions.
  • Lugol-negative areas predict koilocytosis, while white and vascular epithelia patterns suggest overall vaginal intraepithelial neoplasias.
  • A simplified classification includes Lugol-negative area, white epithelia, vascular lesions, wart, and cancer patterns.

Conclusions:

  • Vaginal colposcopy has limited ability to predict the severity of vaginal lesions.
  • Simplifying vaginal colposcopy by categorizing white and vascular epithelia enhances accuracy without loss of diagnostic capability.