Rash decisions: diagnosing zinc deficiency in unexplained dermatitis 

Area of Science:

• Dermatology
• Nutritional Science
• Internal Medicine

Background:

• Zinc is vital for skin health, but deficiency is often overlooked as a cause of dermatitis.
• Patients with conditions like liver disease or inflammatory bowel disease are at higher risk.
• Severe dermatitis can be challenging to diagnose and treat, especially with atypical presentations.

Purpose of the Study:

• To report a case of acquired zinc deficiency presenting as a severe, widespread rash.
• To emphasize the importance of considering zinc deficiency in patients with risk factors and refractory dermatitis.
• To highlight the diagnostic challenges and successful treatment of an acrodermatitis enteropathica-like presentation.

Main Methods:

• A case study of a male patient with alcohol-related liver disease and ulcerative colitis presenting with a severe rash.
• Initial treatments for common dermatological conditions were ineffective.
• Diagnostic workup included imaging, skin biopsy, and serum zinc level testing, followed by zinc supplementation.

Main Results:

• The patient's widespread rash and pneumonia did not respond to initial treatments.
• Serum zinc levels were found to be low.
• Zinc supplementation led to rapid and significant clinical improvement, confirming acquired zinc deficiency.

Conclusions:

• Acquired zinc deficiency can present with severe dermatitis mimicking inherited acrodermatitis enteropathica in at-risk individuals.
• Clinicians should consider micronutrient deficiencies, particularly zinc, in patients with severe, unexplained dermatitis.
• Prompt diagnosis and zinc supplementation are crucial for effective management and improved patient outcomes.