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Fluorouracil has been given systemically for anal, breast, colorectal, oesophageal, stomach, pancreatic and skin cancers (especially head and neck cancers). [12] It has also been given topically (on the skin) for actinic keratoses, skin cancers and Bowen's disease [12] (a type of cutaneous squamous-cell carcinoma), and as eye drops for treatment of ocular surface squamous neoplasia. [13]
Topical 5-fluorouracil (5-FU, Efudex, Carac) has been shown to be an effective therapy for diffuse, but minor actinic cheilitis. 5-fluorouracil works by blocking DNA synthesis. Cells that are rapidly growing need more DNA, so they accumulate more 5-fluorouracil, resulting in their death. Normal skin is much less affected.
Myelosuppression, pulmonary toxicity, hepatotoxicity, neurotoxicity (high dose or intrathecal administration), anaphylactic reactions (rare), Stevens–Johnson syndrome (rare), Toxic Epidermal Necrolysis (rare), kidney failure (rare), osteoporosis (rare), skin and bone necrosis (rare) and macrocytic anaemia (rare).
If there is a persistent sore that does not heal or a growing lump within the rash, a skin biopsy should be performed to rule out the possibility of skin cancer. If the erythema ab igne lesions demonstrate pre-cancerous changes, the use of 5-fluorouracil cream has been recommended.
Actinic keratosis (AK), sometimes called solar keratosis or senile keratosis, [1] [2] is a pre-cancerous [3] area of thick, scaly, or crusty skin. [4] [5] Actinic keratosis is a disorder of epidermal keratinocytes that is induced by ultraviolet (UV) light exposure ().
Fluorodeoxyuridylate, [1] also known as FdUMP, 5-fluoro-2'-deoxyuridylate, and 5-fluoro-2'-deoxyuridine 5'-monophosphate, is a molecule formed in vivo from 5-fluorouracil and 5-fluorodeoxyuridine. FdUMP acts as a suicide inhibitor of thymidylate synthase (TS). By inhibiting the deoxynucleotide biosynthesis, FdUMP stops the rapidly proliferation ...
5. I gladly accepted my guests’ offers to bring dessert and a side dish. One of my relatives graciously offered to bring two pies and some gourmet coffee, while another offered to bring a savory ...
The major side effects of tegafur are similar to fluorouracil and include myelosuppression, central neurotoxicity and gastrointestinal toxicity (especially diarrhoea). [3] Gastrointestinal toxicity is the dose-limiting side effect of tegafur. [3] Central neurotoxicity is more common with tegafur than with fluorouracil. [3]