Neuroimaging clinics of North America
-
Surgery for tinnitus can be divided into procedures directed specifically at elimination of tinnitus versus those directed at an independent primary otopathology whose symptoms include tinnitus. For the latter, although there may be an independent primary goal for which the surgery is undertaken, tinnitus may be expected to improve secondarily. This article will address both tinnitus-specific and tinnitus non-specific procedures for objective and subjective causes.
-
The clinical evaluation of patients with tinnitus differs based on whether the tinnitus is subjective or objective. Subjective tinnitus is usually associated with a hearing loss, and therefore, the clinical evaluation is focused on an otologic and audiologic evaluation with adjunct imaging/tests as necessary. Objective tinnitus is divided into perception of an abnormal somatosound or abnormal perception of a normal somatosound. The distinction between these categories is usually possible based on a history, physical examination, and audiogram, leading to directed imaging to identify the underlying abnormality.
-
Intracranial dural arteriovenous fistulae (DAVF) are pathologic arteriovenous shunts between meningeal arteries and dural venous sinuses or veins. They account for approximately 10% to 15% of all intracranial vascular malformations and are most common in middle-aged patients. DAVF are the most common vascular cause of pulsatile tinnitus. ⋯ The pattern of venous drainage determines the type of DAVF and their risk for hemorrhage. Endovascular treatment has become a first-line option for their management. This article describes the natural history, clinical presentation, classification, imaging features, and management options of intracranial DAVF.
-
Neuroimaging Clin. N. Am. · May 2016
ReviewImaging Interpretation of Temporal Bone Studies in a Patient with Tinnitus: A Systematic Approach.
Tinnitus is an auditory perception of internal origin. Tinnitus is not a diagnosis but a symptom with many possible causes and correspondingly divergent pathophysiologic, anatomic, diagnostic, and therapeutic considerations. This article provides a summary of the imaging findings of structural causes of tinnitus.