Alkalin phosphatase is a predictive factor of unresecability in ampullary and periampullary tumors

Patients with malignant obstructive jaundice should undergo surgery on the basis of results of preoperative imaging. However, about half of patients are found to be unsuitable forresection during surgical exploration. Our study aimed to determine the clinicobiologicalcharacteristics that predict the resecability of ampullary and periampullary tumors.

We retrospectively reviewed the medical records of 49 patients (45% men and 55% women) who had malignant obstructive jaundice collected in the Department B of generalsurgery, Charles Nicolle hospital between July 1, 2008 and December 31, 2013. Predictivevariables of unresecability in malignant obstructive jaundice were identified using univariate andmultivariate analysis.

49 patients were included in the study. The mean age was 66,3±12,9 years. Twenty patients underwent surgery. Radical resection was performed in 12 patients and surgical palliation by biliary bypass was performed in 8 patients. Twenty-nine patients unfit for surgery underwent endoscopic stenting and chemotherapy. At univariate analysis, age (p=0,016), body mass index (p=0,033), worse general health status (p=0,037), locally advanced disease (p<0,001), serum conjugated bilirubin level (p=0,055), and serum level alkaline phosphatase (ALP) (p=0,014) were associated with unresectableampullary and periampullary tumors. At multivariate analysis serum level ALP was identify as an independent factor of unresecability in malignant obstructive jaundice [OR=0,996; IC à 95% (0,992-1,000) ;p=0,048]. The area under the ROC curve was 0,745 (p=0,016).

Serum level of ALP can predict resecability in malignant obstructive jaundice. Further studies are needed to identify other factors predicting resecability and prognosis of ampullary and periampullary tumors.