during the overt tumor phase ( 6-12 days following m-msv ) , observation of neoplastic tissue disclosed proliferation of several cell type ( endothelial , periosteal , fibroblasts , etc . ) , poorly differentiated myoblasts along with atypical rhabdomyoblast-like cells and sarcolytes , type c virus budding from muscle fiber and myoblast plasma membrane , and intense degenerative and regenerative changes in the muscle fibers together with more profuse granulocyte infiltration .
C0016030
fibroblasts
C0007634
cells