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The proportion of subjects who were clinically clear at the 2-year follow-up visit was estimated to be 82.0%. Imiquimod was tolerated when applied daily, with erythema reported for all subjects participating in the study. The recurrence rate observed suggests that once daily dosing and 5x/week dosing yield similar clearance rates, but daily dosing increases local skin reactions.

PDF, Free full text article... We found that 5% imiquimod cream is aneffective treatment option for superficial and nodularbasal cell carcinomas, giving a clearance rate of89.5% at an average of 39 months of follow up.   Dr Yin Vun, Siller Medical, 9th Floor, SilvertonPlace, 101 Wickham Terrace, Brisbane, Qld 4000, Australia.

The precise mechanism of the anti-tumor effect of imiquimod in BCC is not known. It has been postulated that ultraviolet radiation induces mutations in the tumor-suppressor genes and alters the immuno-surveillance, so that tumor cells escape from cytotoxic T cells and apoptosis.[1] Th-2 cytokines, that downregulate tumor surveillance, are raised in BCC.[1],[5] Imiquimod acts on toll-like receptor-7 (TLR-7) present on dendritic cells, macrophages and monocytes and induces expression of interferons, Th-1 cytokines (IL-1, IL-6, IL-10 and IL-12), tumor necrosis factor-a and G-CSF, thereby counteracting Th2 cytokines and promoting tumor surveillance.[1],[5] It also enhances the activity of natural killer cells and epidermal Langerhans' cells. The tumor regression is achieved probably by induction of Fas receptors on the tumor cells resulting in their apoptosis.[10]

For patients without comorbidities, our study revealed good cure rates for superficial BCC and superficial/nodular BCC (88% and 85%, respectively). Nodular and aggressive BCC and Bowen's disease exhibited lower cure rates (50%, 50%, and 57%, respectively). I

For patients without comorbidities, the overall cure rate was 73%. For these patients, the cure rates were 85.7% for superficial and nodular BCC, 88% for superficial BCC, 57% for Bowen's disease, 50% for nodular BCC, and 50% for aggressive BCC.

Topical 5% imiquimod cream is well tolerated and most effective in treating nodular BCC when applied once daily for 7 days per week for either 12 or 6 weeks.

Reduces symptoms, but doesn't reduce morbidity risks or prevent myocardial infarction.