Uncommon Aetiology for Autophony: Patulous Eustachian Tube

We present the case of a 38-year-old male in treatment for morbid obesity for 6 years, who had lost 20 kg of weight in the previous 12 months and who attended consultation after being assessed by 3 other professionals. The patient had also undergone placement of a ventilation tube in the left ear due to a sensation described as auditory ‘‘vibration’’ and autophony in the left ear, with 1.5 years of evolution. The otoscopic image revealed a small, calcareous plate occupying the anteroinferior quadrant of the tympanic membrane of the left ear, with no signs of occupation of the tympanic cavity. The otoscopy of the right ear was normal. Tone audiometry of the right ear showed a bone pathway of 30 dB, with a threshold of 10 dB at low frequencies and sensorineural drop at a frequency of 4000 Hz, probably related to acoustic trauma. In the left ear, the bone and air pathways were overlaid in 30 dB (20 dB in a frequency of 500 Hz)