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Topical cream studied as way to treat skin cancer without the knife
Date:4/28/2009

ST. LOUIS In a case study of a type of melanoma skin cancer typically found on chronically sun-exposed skin, Saint Louis University researchers found that imiquimod, a topical cream, produced good results for patients when used together with surgery to treat the cancer, potentially helping doctors cut less.

The study, published in Dermatologic Surgery, looked at two cases of the most common type of melanoma of the head and neck, lentigo maligna (LM), a type of "melanoma-in- situ", the earliest stage of melanoma. This early form, known as LM, precedes the more invasive form, lentigo maligna melanoma (LMM), and the progression of LM to LMM typically occurs after 10 to 15 years. Though surgical removal of LM is most often used to treat the non-invasive form of the cancer, it can have high local recurrence rates.

In two patients who had both LM and LMM, investigators used imiquimod in conjunction with surgery. In both patients, surgery was first done to remove the area of known invasive disease, followed by the topical cream to the outer area of LM. This approach was chosen with patients who did not want extensive surgery due to the large size of the melanoma on their scalp and face. These cases, along with other recent studies, suggest that imiquimod may help to reduce the area needing surgery, manage the LM and hopefully minimize its recurrence.

"As we're seeing melanoma in younger and younger people, in their 30s and 40s, there is a longer window for the cancer to return and a greater desire to avoid disfiguring surgery," said Scott Fosko, M.D., chairman of the department of dermatology at Saint Louis University School of Medicine and lead study investigator.

Researchers hope that topical treatments like imiquimod may be used to lower the seriousness and the cost of treating the disease, as well as limit scars from surgery, and, most importantly, improve patient care.

"This subtype of melanoma is becom
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Contact: Carrie Bebermeyer
bebermcl@slu.edu
314-977-8015
Saint Louis University
Source:Eurekalert

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