Heavy metals in contact dermatitis: A review

Area of Science:

• Dermatology
• Toxicology
• Immunology

Background:

• Contact dermatitis is a common inflammatory skin reaction from environmental exposures, presenting as irritant or allergic contact dermatitis (ACD).
• Heavy metals, including chromium (Cr), copper (Cu), and lead (Pb), are prevalent in industries and can cause ACD and systemic contact dermatitis (SCD).
• Understanding the epidemiology and clinical features of heavy metal-induced contact dermatitis is crucial for diagnosis and management.

Purpose of the Study:

• To provide an updated review of the epidemiological and clinical characteristics of ACD and SCD caused by chromium, copper, and lead.
• To discuss the effects of contact sensitivity to other heavy metals like gold, cobalt, palladium, and mercury.

Main Methods:

• Literature review focusing on epidemiological and clinical data of contact dermatitis caused by specific heavy metals.
• Analysis of immune responses involving cytokines and T cells in allergic contact dermatitis.
• Discussion of diagnostic laboratory tests such as patch testing and lymphocyte stimulation tests.

Main Results:

• Chromium, copper, and lead are significant causes of both allergic and systemic contact dermatitis.
• Metal allergies can manifest through various clinical presentations, including skin rashes, itching, and lesions.
• Other heavy metals like gold, cobalt, palladium, and mercury also contribute to contact sensitivity.

Conclusions:

• Heavy metals are important etiological agents in contact dermatitis, necessitating awareness in clinical practice.
• Further research into the mechanisms and clinical impact of heavy metal contact sensitivity is warranted.
• Accurate diagnosis through laboratory testing aids in managing contact dermatitis related to heavy metal exposure.