Photomicrograph of neoplasm reveals a dense aggregate of pleomorphic cells of cuboidal to polygonal outline with eosinophilic cytoplasm and ovoid, frequently hyperchromatic, nuclei. Tumour cells are noted pallisading around blood vessels. Rare attempts at acinar formation are observed. Multinucleated cells and karyomegaly are features and one mitotic figure per high power field is counted. (Haematoxylin and Eosin; original magnification 40×).