<prompt> Most common bony tumour of middle ear is:Adeno carcinomaSquamous cell carcinomaGlomus tumourAcoustic neuroma  <response>: Squamous cell carcinoma 107-8-D 213-14-LT 98- Maqbool 11th Squamous carcinoma is the commonest tumour of the middle earIt causes extensive bone destruction involving the facial nerve, labyrinth, the middle cranial fossa, temporomandibular joint and the base of the skull. It also involves the IXth, Xth, XIth, and XIIth cranial nerves and can extend along the eustachian tube into the nasopharynx 213-LT Glomustumour - is the most common benign neoplasm of middle ear, because its origin from glomus bodies. 