Pathology With regard to the malignant behavior of leiomyosarcoma, the most impoant criterion is A Blood vessel penetration by tumor cells B Tumor cells in lymphatic channels C Lymphocyte infiltration D The number of mitoses per high power field 💡 Explanation With regard to the malignant behavior of leiomyosarcoma, the most impoant criterion is ✓ Correct Answer: D. The number of mitoses per high power field