Pulsatile tinnitus in ear is due to:
Malignant otitis media
Osteoma
Mastoid reservoirs
Glomus jugulare tumour
(d) Glomus jugulare tumour(Ref. Scott Brown, 8th ed., Vol 2 page 1283)For the tinnitus to be pulsatile the cause has to be vascular. Vascular causes to tinnitus are Glomus jugulare and internal carotid aneurysms.
Tumors of Ear