Certified Wound Ostomy Nurse (CWON) Practice Test

Which of the following is a common presentation of pyoderma gangrenosum?

1. Itchy, raised lesions

2. Defined craters through the dermis

3. Brown, scaly patches

4. Fleshy, non-painful nodules

The correct answer is: Defined craters through the dermis

Pyoderma gangrenosum typically presents with defined craters that extend through the dermis. This condition is characterized by the rapid development of painful ulcerations that can start as small, red bumps or blisters, often evolving into larger ulcers with a characteristic undermined border. The depth and the appearance of these ulcers are distinctive, as they frequently exhibit purulent and necrotic tissue, making it clear that they penetrate beyond the epidermis into the deeper layers of the skin. The presence of defined craters distinguishes pyoderma gangrenosum from other skin lesions, as the ulcers often have irregular and well-defined edges, and may be surrounded by a network of inflamed tissue. This makes it crucial for healthcare professionals to recognize the unique characteristics of these lesions to ensure appropriate diagnosis and treatment.