5 PATIENT SELECTION 5.1 Eligibility Criteria
Patients must fulfill all the following criteria to be eligible for admission for the study:
1. Histologically proven central nervous system lymphoma of brain parenchyma with or without leptomeningeal involvement.
2. No evidence of systemic lymphoma.
3.
Acute pancreatitis represents the most common complication after ERCP. The reported incidence of this complication varies from less than 1% to 40%, but rates of about 10% are reported in most prospective studies involving non-selected patients. Although most episodes (about 90%) of post-ERCP