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July 1997


Arch Otolaryngol Head Neck Surg. 1997;123(7):762-766. doi:10.1001/archotol.1997.01900070106019

Imaging Quiz Case 1  Phillip A. Pollice, MD; Nasir I. Bhatti, MD; John K. Niparko, MD; Baltimore, MdA 37-year-old woman with mental retardation of unknown origin, seizures, hypothyroidism, chondromalacia, gastrointestinal dysmotility, and chronic anemia was referred for evaluation of progressive unilateral hearing loss and intermittent vertigo. In March 1992, her audiogram revealed a mild symmetrical sensorineural hearing loss: speech reception threshold (SRT), 25 dB in both ears; speech discrimination score (SDS), 90% in both ears. One year later, she began to complain of episodic dizziness. Electronystagmography revealed a significant right-sided weakness on caloric testing and no evidence of spontaneous, gaze, or positional nystagmus; the left side was normal.By March 1995, the patient's episodes of dizziness had increased in severity and frequency, often lasting hours, and were associated with nausea and vomiting. Her hearing loss had progressed on the right side. The audiogram revealed that she had an SRT of 70 dB and an SDS of 85% in the right ear and an SRT of 30 dB

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