Figure 2: Forest plot of pooled data on (a) sensitivity and (b) negative predictive value of laparoscopic ultrasonography in predicting unresectability of pancreatic cancer, which is preoperatively considered to be resectable. *Thomson et al. included 152 patients, 61% had pancreatic adenocarcinoma, 12% presumed pancreatic cancer, 11% ampullary cancer, 5% cholangiocarcinoma, and 11% had other diagnoses. No data solely describing pancreatic cancer patients was available.