Fig. 1.

The PGC was draped sterilely and placed above the surgical field, after conventional surgery was completed. The PGC identified a residual lymph node as a hotspot (a) on the screen, see arrow. Whether the hot SLN cluster was localized by the GP or found by PGC, the SLN cluster (b) was dissected ex vivo, yielding one SLN with a high GP count of 1203 and two non-SLNs with lower counts, which are less than 10% of the hottest SLN (c). A black stich was placed in the SLN, where the highest count was detected to allow the pathologist to target this area for microscopic evaluation (c). PGC portable gamma camera, GP gamma probe, SLN sentinel lymph node