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exe·mes·tane | \ ˌek-sə-ˈmes-ˌtān 
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\Medical Definition of exemestane
: an antineoplastic drug C20H24O2 that is taken orally in the treatment of advanced breast cancer in postmenopausal women
Note: Exemestane is a steroidal aromatase inhibitor that suppresses the synthesis of estrogen, a hormone that acts as a growth factor for breast cancer cells. It is marketed under the trademark Aromasin.
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