<prompt> All are malignant tumors exceptChloromaFibromatosisAskins tumorLiposarcoma  <response>: Ref Robbins 7p770; Harrison 16e p633;9e p1221_1222 Fibromatosis are a group of fibroblastic proliferation through they are locally aggressive, they do not metastasize superficial and deep fibromatosis Plamar ,plantar,penial fibromatosis are superficial type, 