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Arch Otolaryngol Head Neck Surg. 2004;130:799-800.

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Diagnosis: Hypoplasia of the left transverse dural sinus and a prominent right transverse sinus and jugular bulb causing right-sided objective tinnitus

Tinnitus is a common complaint, affecting 10% to 18% of the population.¹ It has multiple causes, so further characterization of the tinnitus helps to narrow the differential diagnosis. Some authors advocate division of tinnitus into sound generated by para-auditory sources (usually vascular or myoclonic) and sound originating from the sensorineural auditory system.² The basis for this division is that there is variance in the examiner's perception of the sound. It is postulated that pulsatile or humming tinnitus is usually of the vascular type regardless of whether it is "objective."²

Although uncommon, objective tinnitus can be debilitating to patients, sometimes resulting in severe social, economic, and psychological sequelae.¹ In objective tinnitus, sometimes called somatosound, the origin of sound is often the awareness of a physiologic sound that is not usually heard, eg, a pulse, bruit, or muscle contraction. When a physiologic sound increases in intensity or when the threshold sensitivity . . . [Full Text of this Article]

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