RIO DE JANEIRO - Brazilian Olympic sprint hopeful Vanda Gomes faces a two-year ban from competition after a positive doping test.

The 26-year-old was found to have traces of aromatase-inhibiting drug anastrozole in a urine sample in September, Brazil's athletics federation (CBAt) said on Monday.

She has been temporarily banned by the CBAt pending a ruling from the country's superior sports justice tribunal. A date for the hearing is yet to be set.

Gomes was a member of Brazil's gold medal-winning 4x100m relay team at the Pan American Games in Guadalajara in 2011.

Anastrozole, commonly prescribed to breast cancer sufferers, works by inhibiting the synthesis of estrogen.