  The properties of few-body clusters (mass number $A \le 4$) are modified if
they are immersed in a nuclear medium. In particular, Pauli blocking that
reflects the antisymmetrization of the many-body wave function is responsible
for the medium modification of light clusters and the dissolution with
increasing density. A more consistent description is given with takes also the
contribution of correlations in the continuum into account. The relation
between cluster formation in warm dense matter and in nuclear structure is
discussed.
