  We perform a systematic search for all possible massive deformations of IIA
supergravity in ten dimensions. We show that there exist exactly two
possibilities: Romans supergravity and Howe-Lambert-West supergravity. Along
the way we give the full details of the ten-dimensional superspace formulation
of the latter. The scalar superfield at canonical mass dimension zero (whose
lowest component is the dilaton), present in both Romans and massless IIA
supergravities, is not introduced from the outset but its existence follows
from a certain integrability condition implied by the Bianchi identities. This
fact leads to the possibility for a certain topological modification of
massless IIA, reflecting an analogous situation in eleven dimensions.
