system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A term newborn presents with frothing, excessive drooling of saliva, coughing of saliva. There was history of polyhydramnios in antenatal period. There is difficulty in passing a  nasogastric tube. What is the probable diagnosis?
assistant
The correct answer is  Tracheo-esophageal fistula :

Newborn presents with frothing, excessive salivation.
Associated with polyhydramnios in antenatal period.
Nasogastric tube is inserted and inability to pass it confirms the diagnosis of TEF.