  We discuss the likely tetraquark interpretation of the X(1576) K+ K-
isovector resonance recently reported by BES with J^{PC}=1^{--}. We point out
that if this interpretation as a four-quark state is correct, the (s u sbar
dbar) tetraquark decays might have striking signatures. We also provide
predictions for possible analogous tetraquarks involving heavy quarks - (c q
cbar qbar) and (b q bbar qbar).
