B07 Viral warts

Name of the Condition

• Viral warts

Summary

Viral warts are benign skin growths caused by infection with the human papillomavirus (HPV). They typically appear as rough, raised lesions and can occur on various parts of the body, including the hands, feet, or genital region. The condition is generally self-limiting but may persist or recur in some individuals.

Causes

Viral warts are caused by the human papillomavirus (HPV), a DNA virus that infects the epithelial cells of the skin or mucous membranes. Transmission occurs through direct contact with infected skin or contaminated surfaces. Different HPV types are associated with specific wart types, such as common warts (HPV 2, 4) or plantar warts (HPV 1, 4).

Risk Factors

• Direct contact with an individual who has visible warts or asymptomatic HPV shedding.
• Compromised skin integrity, such as cuts or abrasions.
• Weakened immune system, including conditions like HIV/AIDS or immunosuppressive therapy.
• Age, with children and young adults more commonly affected.
• Walking barefoot in communal areas, increasing risk of plantar warts.

Symptoms

• Rough, raised, or flat growths on the skin.
• Flesh-colored, pink, or brown lesions that may have a cauliflower-like appearance.
• Pain or tenderness, especially with plantar warts on weight-bearing areas.
• Itching or irritation in some cases.

Diagnosis

Diagnosis is typically clinical, based on the appearance of the lesions. A healthcare provider may examine the wart visually and assess its location and characteristics. In ambiguous cases, a biopsy or dermatoscopy may be used to confirm the diagnosis and rule out other skin conditions.

Treatment Options

• Topical treatments, such as salicylic acid or cryotherapy (freezing with liquid nitrogen).
• Laser therapy or surgical excision for resistant or extensive warts.
• Immunotherapy, including topical agents that stimulate the immune response.
• Observation for warts that resolve spontaneously.

Prognosis and Follow-Up

Most viral warts resolve on their own within 1-2 years, though some may persist longer. Treatment can accelerate resolution, but recurrence is possible. Follow-up may be recommended if warts are persistent, painful, or located in sensitive areas.

Complications

• Secondary bacterial infection from scratching or trauma.
• Scarring or pigmentation changes after treatment.
• Discomfort or pain, particularly with plantar warts.
• Rarely, progression to malignancy in high-risk HPV types (e.g., genital warts).

Lifestyle & Prevention

• Avoid direct contact with warts on others or shared surfaces.
• Keep skin clean and intact to reduce infection risk.
• Wear protective footwear in communal areas like pools or locker rooms.
• Practice good hand hygiene to prevent spread.

When to Seek Professional Help

• Warts are painful, rapidly growing, or bleeding.
• Warts appear on the face, genitals, or mucous membranes.
• Home treatments are ineffective after several weeks.
• There is uncertainty about the diagnosis or concern for malignancy.

Tips for Medical Coders

Document the type and location of the wart (e.g., common, plantar, genital) and any associated symptoms or treatments. Ensure the code B07 is used for viral warts without specifying HPV type, as the code is broad and does not require additional subtyping. Include details about clinical presentation and management for accurate coding.