We show that the natural map from 2-adic algebraic K-theory to
2-adic étale K-theory induces an isomorphism in positive degrees
for rings of 2-integers in totally imaginary number fields. In this
sense, 2-adic algebraic K-theory of totally imaginary number fields
satisfies étale descent in positive degrees.
This paper appeared in K-theory 16 (1999), 101-104.