Efficiency of percutaneous core biopsy in pancreatic tumor diagnosis

Background. Radiologic diagnosis of pancreatic tumors exhibits limited precision. The aim of this study was to investigate the outcome and complications of pancreatic core biopsy in patients with suspected pancreatic neoplasms. Methods. One hundred patients underwent ultrasonography-guided core biopsy of 1.2 mm external diameter. Medical charts were examined for biochemical and clinical signs Of complications. Final diagnosis was settled by operation, autopsy, and clinical signs of the disease including survival with at least 2.3 years of follow-up. Results. Histopathologic biopsy evaluation showed correct discrimination between exocrine and endocrine tumors and nonneoplastic conditions in 89 patients. No false positive cancer diagnosis was found and guidance on nature of primary tumors was obtained for eight of eight metastases. The sensitivity was 91 % for exocrine and 87% for endocrine pancreatic tumors, and negative predictive values of these diagnoses were 83% and 97%, respectively. No clinically significant complications were noted. Conclusions. Core biopsy is an attractive alternative to diagnostic laparotomy in unresectable pancreatic cancer and efficiently provides diagnosis of endocrine tumors and pancreatic metastases in conjunction with rare complications. Benign biopsy findings cannot be used to exclude presence of primary or metastatic pancreatic neoplasms.