Figure 1

a) Retroperitoneal pleomorphic liposarcoma (H&E x400) b) Weak expression of beta-catenin in pleomorphic retroperitoneum liposarcoma (< 20% of neoplastic cells showed cytoplasmic immunoreactivity ( long arrow ) and < 5% nuclear immunoreactivity ( short arrow ) (DAB X400)). c) Weak expression of beta-catenin in extremity liposarcoma ((< 20% of neoplastic cells showed cytoplasmic immunoreactivity (long arrow) and < 5% nuclear immunoreactivity (short arrow) (DAB x400). d) Area with extensive membranous and cytoplasmic expression of beta-catenin in an extremity liposarcoma ((< 50% of neoplastic cells showed cytoplasmic and membranous immunoreactivity (long arrow) (DAB x400)).