A 9-year-old boy was seen by an otolaryngologist for subjective right-sided hearing loss. Examination The hearing test indicated mild conductive hearing loss at low and middle frequencies. Otoendoscopy showed a mass behind the right eardrum and in contact with the malleus (refer attached figure).

What is the most likely diagnosis? *This case is from Docplexus editorial team for educative purpose only. Source: NEJM Stay Connected, the answer will be posted soon!