Systemic Interferon Alfa Injections for the Treatment of a Giant Orf
Orf is a zoonotic infection caused by a parapoxvirus and is endemic in sheep and goats. It may be transmitted to humans by direct contact with infected animals. We report a case of a giant orf in a patient with chronic lymphocytic leukemia (CLL), which proliferated dramatically after surgical excision and resolved after systemic interferon alfa-2a injections.
Resident Pearl
- Human orf lesions spontaneously resolve in 4 to 8 weeks; however, in immunocompromised patients, orf lesions may be persistent, atypical, and giant. We observed that surgical interventions for treatment of orfs cause a delay in the natural healing process, and other treatment options such as subcutaneous interferon alfa-2a may be used.
Conclusion
We present a rare case of a giant orf treated with systemic interferon alfa-2a injections. Because intralesional injections are quite painful, systemic subcutaneous injections of interferon might be a good and safe alternative for recalcitrant orf lesions in immunocompromised patients. However, more studies and reports are needed to confirm its effectiveness and safety.
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