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Related Concept Videos

Papillary Dermis01:11

Papillary Dermis

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 and...
Elastin is Responsible for Tissue Elasticity01:12

Elastin is Responsible for Tissue Elasticity

Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Reticular Dermis01:15

Reticular Dermis

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...
Desmosomes01:05

Desmosomes

The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...
Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.

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Langerhans cells in delayed skin reactions to inhalant allergens in atopic dermatitis--an electron microscopic study.

Clinical and experimental dermatology·1989
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Pseudoxanthoma elasticum-like papillary dermal elastolysis.

V Bagher Zadeh1, N Najem, M El-Sayed Hanafy

  • 1Department of Dermatology, Adan Hospital, PO Box 46969, Fahaheel 64020, Kuwait. walid_md2000@hotmail.com

Acta Dermatovenerologica Alpina, Pannonica, Et Adriatica
|September 1, 2011
PubMed
Summary
This summary is machine-generated.

Pseudoxanthoma elasticum-like papillary dermal elastolysis (PXE-PDE) is an acquired disorder causing loss of elastic fibers in the skin. Unlike PXE, it affects only the papillary dermis and has no systemic involvement.

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Area of Science:

  • Dermatology
  • Pathology

Background:

  • Elastolysis is the degradation of elastic fibers in the skin.
  • It can impact different layers of the dermis, including the papillary and reticular layers.

Observation:

  • Pseudoxanthoma elasticum-like papillary dermal elastolysis (PXE-PDE) is a distinct clinicopathological entity.
  • This acquired disorder primarily affects the papillary dermis.

Findings:

  • PXE-PDE presents clinically with features resembling pseudoxanthoma elasticum (PXE).
  • Histological examination reveals differences from PXE.
  • PXE-PDE is characterized by the absence of systemic involvement, differentiating it from PXE.

Implications:

  • Understanding PXE-PDE is crucial for accurate dermatological diagnosis.
  • Distinguishing PXE-PDE from PXE is important for patient management and prognosis.
  • Further research into the pathogenesis of acquired elastolytic disorders is warranted.