病理报告显示为细胞分化程度低的间变性肿瘤。

The pathology report indicated an ___anaplastic tumor with poorly differentiated cells.

显微镜下观察到肿瘤细胞呈现明显的anaplastic特征，这表明病情恶化。

The microscope revealed obvious ___anaplastic features in the tumor cells, suggesting disease progression.