This figure shows the migration activity of mDC (patient no. 5) and iDC (patient no. 2) labelled with 99mTc-HMPAO (A) and of mDC and iDC (patient no. 3) labelled with 111In-Oxine (B). The acquisition times with gamma camera are reported along the X-axis and the Y-axis shows the counts per 10 min. mDC migrating to regional lymph node are always higher than iDC. 99mTc-HMPAO-labelled DC were detected in lymph nodes within 1 h of administration and the maximum concentration was reached within 60 min for iDC and between 18 and 20 h after inoculation for mDC.