In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.
Q:  The conventional surgical treatment of bleeding oesophageal varices in the emergency situation is based upon the Boerema - Crile operation of transthoracic oesophagotomy and ligation of the varices .
A: 
oesophageal