Their histogenetic origin is still unsolved, but a recently reported EWS/FLI-1 translocation t(11;22)(q24;q21) and the consistent expression of CD56 and the progesterone receptor, both genes located on the long arm of chromosome 11, point to chromosome 11q as a potential locus of gene aberration in solid pseudopapillary neoplasms.     ///    "Solid pseudopapillary neoplasms of the pancreas are associated with FLI-1 expression, but not with EWS/FLI-1 translocation.. "    ///    It is concluded that FLI-1 expression in solid pseudopapillary neoplasms is not associated with an EWS/FLI-1 translocation. 