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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...
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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
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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...
Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...

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Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping
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Published on: October 24, 2014

The many faces of phytophotodermatitis.

Hiram Larangeira de Almeida1, Valeria Magalhães Jorge

  • 1Catholic and Federal University of Pelotas, Brazil. hiramalmeidajr@hotmail.com

Dermatology Online Journal
|April 27, 2007
PubMed
Summary

Phytophotodermatitis is a skin reaction from plant contact and sun exposure. It can mimic other conditions and often presents as hand hyperpigmentation, though blisters and other lesions can occur.

Area of Science:

  • Dermatology
  • Photomedicine
  • Toxicology

Background:

  • Phytophotodermatitis is a common cutaneous reaction.
  • It results from contact with plant substances followed by sunlight exposure.
  • This condition can be misdiagnosed, mimicking other dermatological and medical conditions.

Purpose of the Study:

  • To describe the clinical presentation of phytophotodermatitis.
  • To highlight its differential diagnoses.
  • To increase awareness of this phototoxic reaction.

Main Methods:

  • Review of clinical presentations.
  • Analysis of patient cases.
  • Comparison with differential diagnoses.

Main Results:

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Published on: June 23, 2016

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  • The most frequent presentation is hyperpigmentation on the dorsum of the hands.
  • Less common findings include blisters and lesions resembling solar lentigines or melasma.
  • Phytophotodermatitis can be mistaken for child abuse, impetigo, superficial lymphangitis, and larva migrans.

Conclusions:

  • Phytophotodermatitis has a characteristic presentation but can mimic various conditions.
  • Accurate diagnosis is crucial to avoid misdiagnosis and ensure appropriate management.
  • Awareness of plant-induced phototoxic reactions is important for clinicians.