<prompt> Prolonged blockade of Eustachian tube leads to ?Atelectatic earCholesteatomaPerforationAll of the above  <response>: Ans. isdi.e., All of the aboveRf Dhingra 6he p. 60Acute tubal blockage - AbsorPtion of ME gases - Negative Pressure in ME - Retraction of TM - Transudate in MEhaemorrhage acute OME - Prolonged tubal blockagedysfunction - OME thin watery or mucoid discharge - Atelectatic earPerforation - Retraction pocketcholesteatoma 