evaluation of surgical gamma probes for sentinel node localization in cervical and vulvar cancer background sentinel node sn scintigraphy for cervical and vulvar cancer guides the gynaecological oncologist in finding the metastatic lymph nodes during lymphadenectomy the role of the surgical gamma probe in the sentinel node concept in gynaecological oncology is to localise sn both intraoperatively and transcutaneously intraoperative handheld collimated gamma probes are increasingly used for detection of the sentinel lymph nodematerial and methods a comparative evaluation of hand held gamma probes neoprobe 1500 europrobe gamma finder gamma ray prospector grp1 and gpr2 was performed using different detection methods laboratory tests were performed in which sensitivity spatial resolution and angular sensitivity were evaluatedresults the results for each gamma probe were summarised and discussedconclusion awareness of a gamma probes capabilities and limitations should be considered in the appropriate selection of a device