The evolution of follicular and the relevance of transformation to DLBCL
A. Lister
London, UK
Polymorphous sarcomatous change of follicular lymphoma was first recognised in 1938, and is generally perceived to have a poor prognosis. The frequency with which it has been reported ranges from 5-50% from series to series, depending on the length of follow-up, and biopsy and post mortem policies.