Histology of SA-1 tumors. Histology was evaluated at day 5 after intratumoral mIL-12 gene electrotransfer alone (A and B) or combined with irradiation (C and D). The arrows show infiltrating immune cells (L – lymphocytes, Gr – granulocytes, M – macrophages, P – plasma cells) and giant cells in mitotic arrest (G).
Sedlar et al. BMC Cancer 2013 13:38 doi:10.1186/1471-2407-13-38