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Study |

Secondary Hyperpigmentation During Interferon Alfa Treatment for Chronic Hepatitis C Virus Infection

Katerina Tsilika, MD; Albert Tran, MD, PhD; Régine Trucchi, MD; Sinziana Pop, MD; Rodolphe Anty, MD; Nathalie Cardot-Leccia, MD; Jean-Philippe Lacour, MD; Jean-Paul Ortonne, MD; Thierry Passeron, MD, PhD
JAMA Dermatol. 2013;149(6):675-677. doi:10.1001/jamadermatol.2013.1989.
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Importance Interferon alfa remains the central treatment for chronic hepatitis C virus (HCV) infection. Cases of cutaneous and mucous hyperpigmentations during interferon alfa treatment have been reported, but they are considered rare adverse effects.

Objective To study the clinical presentation and frequency of hyperpigmentation in patients receiving interferon alfa treatment for chronic HCV infection.

Design Prospective, descriptive clinical trial.

Setting Monocentric study performed in the Departments of Hepatology and Dermatology of the University Hospital of Nice, Nice, France.

Participants Consecutive patients treated with pegylated interferon alfa-2b and ribavirin for chronic HCV infection.

Main Outcome Measures Demographic data and medical history were noted. A systematic clinical and dermoscopic examination of skin, nails, and mucous membranes was performed, and skin biopsies were performed if needed.

Results Of 77 patients who were included, 16 (21%) presented with hyperpigmentation. Hyperpigmentation of the oral mucous membrane, acquired longitudinal melononychia, and hyperpigmentation of the face were each observed in 7 patients (9%). All patients with hyperpigmentation of the skin had skin type III or IV and worked outside without sun protection. The intensity of pigmentation was reported to decrease progressively when interferon treatment was discontinued. Most patients with hyperpigmentation of the oral mucosa also had melanonychia. However, patients with hyperpigmentation of the skin did not have mucosal or nail involvement, suggesting 2 distinct mechanisms.

Conclusions and Relevance Secondary hyperpigmentation during interferon alfa treatment occurs as an adverse event in 21% of patients, especially in those with dark skin types who have unprotected sun exposure. Physicians should be aware of the adverse effects of interferon treatment and advise patients in the use of sun protection, especially patients with darker skin types.

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Figure. Hyperpigmented lesions after interferon alfa treatment. A, Hyperpigmentation of the tongue. B, Hyperpigmentation of the inner side of the cheek. C, Acquired longitudinal melanonychia. D, Cutaneous gray hyperpigmentation of the face.




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