EADV: Imiquimod May Eradicate Superficial Basal Cell Carcinoma
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EADV: Imiquimod May Eradicate Superficial Basal Cell Carcinoma

By Bonnie Darves

BARCELONA, SPAIN -- October 24, 2003 -- Six weeks of treatment with imiquimod 5% cream may help eradicate superficial basal cell carcinoma, based on results of a new European study presented here at the European Academy of Dermatology & Venereology Congress.

As the efficacy and safety results of this open-label Phase III study were more promising than expected, imiquimod 5% (IQ-5) may emerge as a noninvasive treatment for early-stage basal cell cancers, said lead investigator Harald Gollnick, MD, University of Dermatology and Venereology, Magdeburg, Germany, provided continued follow-up studies -- including this continuing study -- confirm that recurrence rates remain low.

The multicentre study, involving 182 European Caucasian patients (predominantly male and with a mean age of 65 years), evaluated the long-term safety and efficacy of IQ-5 in eradicating tumours with a minimum area of 0.5 cm2 and a maximum diameter of 2.0 cm. Median tumour size was 1.0 cm, and the majority of sites treated were on the trunk. Initial clearance rate was 90%. Nearly 90% of subjects reported that they have tanned "minimally" in the past.

Patients were treated with IQ-5 cream 5 days a week for 6 weeks, and were assessed at 6 months, 12 months and annually. Assessment will continue for a total period of 4 years.

Based on the first year's results, IQ-5 was both safe and efficacious, with minimal adverse events. Approximately 92% of subjects had achieved clearance at 12 weeks post-treatment, and of those subjects, 97.4% retained a sustained clearance rate of 97% by Month 12.

Adverse events, primarily application site reactions, affected 19% of patients. But most were mild and resolved after treatment was discontinued. To date, three subjects in the 25-centre study have discontinued because of adverse events, Dr. Gollnick noted, confirming that IQ-5 is a safe alternative treatment starting point for non-advanced basal cell tumours.

[Study title: Long-term Efficacy of Imiquimod 5% Cream for Treatment of Superficial Basal Cell Carcinoma: a European Study. Poster 5-17]

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