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Related Concept Videos

Papillary Dermis01:11

Papillary Dermis

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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
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Reticular Dermis01:15

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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...
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Accessory Structures of the Skin: Hair and Hair Follicles01:16

Accessory Structures of the Skin: Hair and Hair Follicles

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Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
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Related Experiment Video

Updated: Apr 3, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
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Vascular structures in dermoscopy.

Erhan Ayhan1, Derya Ucmak2, ZeynepMeltem Akkurt2

  • 1Zile State Hospital, Tokat, TR.

Anais Brasileiros De Dermatologia
|September 17, 2015
PubMed
Summary

Dermoscopy aids in visualizing skin layers for diagnosing lesions. This review focuses on vascular structures in both melanocytic and non-melanocytic skin lesions, analyzing recent literature and conflicting viewpoints.

Area of Science:

  • Dermatology
  • Medical Imaging

Background:

  • Dermoscopy is a key tool for visualizing skin structures.
  • Traditionally used for melanocytic lesions, its application has expanded to non-melanocytic lesions.
  • Vascular patterns within lesions offer diagnostic clues.

Purpose of the Study:

  • To review the role of vascular structures in dermoscopy.
  • To analyze lesion-specific vascular patterns and arrangements.
  • To reconcile conflicting views on dermoscopic vascular criteria.

Main Methods:

  • Literature review of dermoscopic studies.
  • Analysis of vascular structures and their arrangement patterns.
  • Discussion of diagnostic criteria for various lesions.

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Main Results:

  • Specific vascular structures and arrangements are characteristic of certain lesions.
  • Dermoscopy reveals distinct vascular patterns in both melanocytic and non-melanocytic lesions.
  • Conflicting interpretations of vascular features exist in the literature.

Conclusions:

  • Dermoscopy is valuable for diagnosing a wider range of skin lesions beyond melanocytic types.
  • Understanding vascular morphology is crucial for accurate dermoscopic diagnosis.
  • Further research is needed to standardize the interpretation of dermoscopic vascular patterns.