<prompt> Answer this question truthfullyWhat are the laboratory findings associated with Boerhaave syndrome?  <response>: <reason> Laboratory findings often are nonspecific. Patients may present with leukocytosis. As many as 50 of patients with Boerhaave syndrome have a hematocrit value of 50 due to fluid loss into pleural space and tissues. Many patients present with a pleural effusion. Thoracentesis with examination of the pleural fluid can aid in diagnosis which may contain undigested food, pH less than 6, or have an elevated amylase level. 