ABSTRACT
BACKGROUND AND OBJECTIVES: Recurrent vestibulopathy (RV) is a clinical syndrome of unknown etiology characterized by multiple episodic vertigo without auditory or neurological signs or symptoms. The purpose of this study is to investigate the clinical characteristics and the natural course of RV with diuretics medication. MATERIALS AND METHODS: During the period January 2008 to December 2010, we reviewed the clinical records of 30 patients diagnosed with RV. All patients were given hydrochlorothiazide medication at least 3 months, approached by telephone and using a questionnaire to make a long term follow-up. The analysis included age, sex distribution, natural history, pure tone audiometry, caloric response, age at onset, and the characteristics of vertigo. RESULTS: Median follow-up was 29 months (range, 27-37 months). Patients had a mean age at onset of 48.2 years and a mean duration of 2.75 years. An obvious female predilection was found, and unilateral caloric paresis (> or =25%) was seen in 23.3%. Of the 30 patients, symptoms resolved in 80% but were unchanged in 20%. No patient with RV developed a central nervous system disease or benign paroxysmal positional vertigo during follow-up. CONCLUSION: The present study shows that in the majority of cases, vertigo resolved following diuretics medication. In cases of the patients with severe or disabling recurrent vestibulopathy, the diuretics medication may be effective in reducing the frequency of vertigo attacks.
Subject(s)
Female , Humans , Audiometry , Central Nervous System , Diuretics , Follow-Up Studies , Hydrochlorothiazide , Natural History , Paresis , Surveys and Questionnaires , Sex Distribution , Telephone , Vertigo , Vestibular NeuronitisABSTRACT
Intracranial lipomas are unfrequent tumors developed from mesenchymatous cells. The corpus callosum is the most frequent location (50%) in the intracranial regions, and these tumors are rarely present in the cerebellopontine angle, the internal acoustic meatus, or intravestibular lesions. With a review of literature, authors report a rare case of the left-sided intravestibular lipoma presented as sudden hearing loss in 17-year-old female. Furthermore, differential diagnostic magnetic resonance imaging characteristics of lipomas are discussed in detail.
Subject(s)
Female , Humans , Acoustics , Cerebellopontine Angle , Corpus Callosum , Hearing Loss, Sudden , Lipoma , Magnetic Resonance Imaging , Vestibule, LabyrinthABSTRACT
Tumors occurring in the external auditory canal (EAC) are rare. In particular, tubular adenoma (TA) is an extremely rare sweat gland neoplasm occurring in the EAC and is generally considered as benign. Up to now, less than one hundred cases of TA have been reported in the English literature. In fact, a comprehensive review of literature shows that TA in the EAC has seldom been reported. Herein, we report a case of a 35-year-old man with TA that occured in the EAC, together with characteristic histopathological findings.
Subject(s)
Adenoma , Aminocaproates , Apocrine Glands , Ear Canal , Sweat Gland NeoplasmsABSTRACT
The threat of pandemic influenza has focused attention and resources on virus surveillance, prevention, and containment. The World Health Organization has strongly recommended the use of the antiviral drug, Oseltamivir (Tamiflu(R)), to treat and prevent pandemic influenza infection. In recent years, there have been case reports of vestibulocochlear events during or after oseltamivir treatment, other countries. Oseltamivir is generally well-tolerated and its most frequent adverse effects include nausea and vomiting, diarrhea, and abdominal pain. Up to now, bilateral vestibular hypofunction after oseltamivir medication has not been reported. Herein, we report a very rare case of a 36-year-old female with bilateral vestibular hypofunction following oseltamivir medication.
Subject(s)
Female , Humans , Abdominal Pain , Containment of Biohazards , Diarrhea , Drug-Related Side Effects and Adverse Reactions , Influenza, Human , Nausea , Oseltamivir , Pandemics , Vestibular Function Tests , Viruses , Vomiting , World Health OrganizationABSTRACT
BACKGROUND AND OBJECTIVES: The aim of this study was to examine the localizations of beta1- and beta2-adrenergic receptors (ARs) in rat vestibular nuclei by immunohistochemical staining procedure. MATERIALS AND METHODS: Twelve male Sprague-Dawley rats were used in this study. Primary antibodies for the beta1- and beta2-ARs were used. The sections were treated with a biotinylated goat anti-rabbit antibody. The sections were then incubated in avidin-biotin-peroxidase reagent and processed with immunoperoxidase using 3.3'-diaminobenzidine tetrahydrochloride. RESULTS: beta1-AR and beta2-AR immunopositive neurons were found to be distributed throughout the four major vestibular nuclei. Both receptors were primarily detected in neuronal somata and their proximal dendrites. beta1-AR and beta2-AR were moderately expressed in the superior vestibular nucleus, lateral vestibular nucleus, medial vestibular nucleus, and spinal vestibular nucleus. CONCLUSION: The present study demonstrates, for the first time, that beta1-AR and beta2-AR receptors are localized in rat vestibular nuclei. Furthermore, this study may provide additional speculation into the role of ARs during vestibular signal processing. Further studies are needed to clarify the roles played by beta1-ARs and beta2-ARs through physiologic and functional studies.