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Related Concept Videos

Skin Diseases and Disorders01:23

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
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...
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...
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...
Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...

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Related Experiment Video

Updated: May 15, 2026

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
10:27

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis

Published on: December 15, 2011

Pityriasis rubra pilaris.

Marie Leger1, Tracey Newlove, Maria Robinson

  • 1The Ronald O. Perelman Department of Dermatology, New York University School of Medicine, USA.

Dermatology Online Journal
|January 5, 2013
PubMed
Summary
This summary is machine-generated.

Pityriasis rubra pilaris (PRP) is a rare inflammatory skin disease. This case highlights acantholysis on biopsy as a key diagnostic finding, alongside treatment options.

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Granulocyte-dependent Autoantibody-induced Skin Blistering
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Granulocyte-dependent Autoantibody-induced Skin Blistering

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Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
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Stimulation of Stem Cell Niches and Tissue Regeneration in Mouse Skin by Switchable Protoporphyrin IX-Dependent Photogeneration of Reactive Oxygen Species In Situ
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Granulocyte-dependent Autoantibody-induced Skin Blistering
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Granulocyte-dependent Autoantibody-induced Skin Blistering

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Area of Science:

  • Dermatology
  • Histopathology

Background:

  • Pityriasis rubra pilaris (PRP) is a rare, chronic inflammatory skin disorder with unknown causes.
  • Diagnosis can be challenging due to variable clinical presentations.

Observation:

  • This case report details a patient with Pityriasis rubra pilaris.
  • Histopathologic examination revealed acantholysis, a feature increasingly noted in PRP.

Findings:

  • Acantholysis, the loss of cohesion between epidermal cells, was a significant histopathologic finding.
  • This feature aids in differentiating PRP from other scaly dermatoses.

Implications:

  • Recognizing acantholysis in PRP improves diagnostic accuracy.
  • Understanding clinical and histopathologic features guides effective treatment strategies for Pityriasis rubra pilaris.