Foster Kennedy syndrome is a constellation of findings associated with tumors of the frontal lobe. Foster Kennedy syndrome is a constellation of findings associated with tumors of the frontal lobe. Although Foster Kennedy syndrome is equated with Kennedy syndrome, it should not be confused with Kennedy disease, which is named for William R. Kennedy. Pseudo-Foster Kennedy syndrome is defined as one-sided optic atrophy with papilledema in the other eye but with the absence of a mass.