TLR7 and basal cell carcinoma: Imiquimod has known antitumor activity in superficial basal cell carcinoma and it is thought to work by stimulating the innate and adaptive immune system in the applied area via toll-like receptor 7.[29] The patient's left axillary lesions resolved after she applied imiquimod cream to the area, suggesting that imiquimod may be able to be used to treat superficial metastases from TNBC.