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Increased Risk of Skin Cancer for Psoriasis Patients
September 26, 2001The risk of squamous cell cancer of the skin is increased in patients treated for psoriasis with ciclosporin in addition to photochemotherapy, conclude authors of a study in this week's issue of The Lancet.
Immunosuppressive treatments such as ciclosporin have been associated with an increased risk of skin cancer, although most previous research has focused on patients who have had organ transplants. In the early 1970s, a new treatment for the severe skin condition psoriasis was introduced-combination of the light-sensitive drug psoralen and exposure to ultraviolet-A radiation (puva); immunosupressive drugs including ciclosporin and methotrexate are used to treat severe psoriasis cases.
Isabelle Marcil and Robert Stern from Beth Israel Deaconess Medical Center, Boston, USA, aimed to assess the risk of skin cancer in patients taking ciclosporin who had been exposed to PUVA and other treatments for severe psoriasis. The frequency of squamous-cell skin cancer for 28 patients (who had previously taken part in the PUVA study) and who were on ciclosporin was compared before and after their first use of ciclosporin. The investigators also analysed the entire PUVA study population (1380 patients) to assess the relation between ciclosporin use and frequency of squamous-cell cancer.
In the 5 years before first ciclosporin use, six of 28 (21%) ciclosporin users developed a total of 20 squamous cell cancers. After ciclosporin use (average follow-up 6 years), 13 (46%) developed a total of 169 squamous-cell carcinomas. After adjustment for amount of exposure to PUVA and methotrexate, incidence of tumours was seven times higher after first ciclosporin use than in the previous 5 years. Any use of ciclosporin was associated with a three-fold increase in risk of squamous-cell cancer, and use for at least 3 months was associated with a nearly four-fold increase. Patients were at substantially greater risk with 3 months or longer use of ciclosporin than with exposure to at least 200 PUVA treatments. Long-term use of methotrexate was associated with lower risk than either any ciclosporin or high-dose PUVA use
Robert Stern comments: "New immunomodulatory therapies hold great promise for improving the treatment of severe psoriasis. However, the great increase in skin cancer risk we have documented in patients with severe psoriasis treated with the first immunomodulatory therapy for this disease strongly argues that careful assessment of the long-term safety of new immunologically based treatments for psoriasis is needed."
Lancet
In the 5 years before first ciclosporin use, six of 28 (21%) ciclosporin users developed a total of 20 squamous cell cancers. After ciclosporin use (average follow-up 6 years), 13 (46%) developed a total of 169 squamous-cell carcinomas. After adjustment for amount of exposure to PUVA and methotrexate, incidence of tumours was seven times higher after first ciclosporin use than in the previous 5 years. Any use of ciclosporin was associated with a three-fold increase in risk of squamous-cell cancer, and use for at least 3 months was associated with a nearly four-fold increase. Patients were at substantially greater risk with 3 months or longer use of ciclosporin than with exposure to at least 200 PUVA treatments. Long-term use of methotrexate was associated with lower risk than either any ciclosporin or high-dose PUVA use
Robert Stern comments: "New immunomodulatory therapies hold great promise for improving the treatment of severe psoriasis. However, the great increase in skin cancer risk we have documented in patients with severe psoriasis treated with the first immunomodulatory therapy for this disease strongly argues that careful assessment of the long-term safety of new immunologically based treatments for psoriasis is needed."
Lancet
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Latest analysis confirms suboptimal vitamin D levels in millions of US children
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Geologists studying groundwater arsenic levels in India empower Bengali women, children
A Kansas State University geologist and graduate student are finding that the most important tools in their fieldwork on groundwater arsenic pollution are women and children armed with pamphlets and testing kits.
Melanoma treatment options 1 step closer
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Many resident physicians are not trained in skin cancer examinations, nor have they ever observed or practiced the procedure.
Researchers find demand for cosmetic and surgical procedures in dermatologic surgery rising rapidly
Researchers from Boston University School of Medicine (BUSM) and the Laser and Skin Cancer Center of Indiana, (Carmel, Indiana), found that there has been a dramatic increase in the number of procedures performed and patient demand for dermatologic health care since 2000.
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