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Radiology Quiz Case 1: Diagnosis
Arch Otolaryngol Head Neck Surg. 2009;135(6):614.
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Diagnosis: Intralabyrinthine hemorrhage
Although the majority of cases diagnosed as sudden sensorineural hearing loss (SSNHL) are grouped in the diagnostic category of idiopathic, an investigation into the known causes of SSNHL should be undertaken. Viral labyrinthitis, vascular causes, neoplasms, autoimmune diseases, trauma, and toxic drug reactions are all potential pathogenetic factors that should be investigated before the conclusion is reached that the hearing loss is idiopathic. Labyrinthine hemorrhage has been associated with sickle cell disease,1 chronic myelogenous leukemia,2 systemic lupus erythematosus,3 endolymphatic sac tumors,4-6 and the use of anticoagulants.7 Radiographic diagnosis is characterized by high signal intensity of the labyrinth on noncontrast T1-weighted MRIs (Figures 1 and 2) and T2-weighted fluid-attenuated inversion recovery MRIs.8 T2-weighted MRIs demonstrate variable signal intensity of the affected labyrinth in the setting of intralabyrinthine hemorrhage (Figure 3). In contrast, a mass such as a lipoma would result in low signal intensity on T2-weighted MRIs. The . . . [Full Text of this Article]
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Radiology Case Quiz 1
Peter R. Sabatini and Joe Walter Kutz, Jr
Arch Otolaryngol Head Neck Surg. 2009;135(6):612.
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