Unusual Morphologic Features of a Primary Liver Neoplasm

Light and electron microscopy study of an unusual primary liver neoplasm observed in a 36-year-old woman. By light microscopy the tumor, initially detected by a needle biopsy and later surgically removed, was mainly composed of spindle-shaped and multinucleated cells which were similar to rhabdomyoblasts. These cells, however, showed ultrastructural features of hepatocytes.