Gummatous neurosyphilis in an elderly patient in the Australian outback: a case report

Introduction Neurosyphilis is an infection caused by the spirochete Treponema pallidum, which causes infiltration and thickening of brain meninges. Despite being an Old World disease, the rates of infection continue to rise. This clinical challenge involves early and accurate diagnosis, as neurosyphilis masquerades with various clinical symptoms and is often missed during initial presentation to the hospital. A comprehensive history and clinical examination are essential to detect suspicious cases early for further cerebrospinal fluid examination and neuroimaging. Patients treated with benzylpenicillin for a specific duration often show promising clinical and cognitive improvement, thus emphasizing the need for constant vigilance in our day-to-day practice. Case presentation A 77-year-old Caucasian gentleman presented to our hospital repeatedly with multiple episodes of presyncope and cognitive impairment. He also demonstrated bilateral deafness, tabes dorsalis, and left sixth cranial nerve palsy. His cerebrospinal fluid examination showed a nonreactive venereal disease research laboratory test, and magnetic resonance imaging of the brain revealed a gumma. Conclusion The diagnosis of neurosyphilis in the elderly requires a combination of clinical vigilance and a high index of suspicion, along with multimodal investigations, including cerebrospinal fluid examination and brain imaging.

Deafness after COVID-19?

This article presents a case of sudden bilateral deafness in the context of a severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) infection and resultant coronavirus disease 2019 (COVID-19). After treatment in the intensive care unit for acute respiratory distress syndrome and acute kidney failure, hearing ability had drastically changed. While hearing had been subjectively normal before the infection, deafness was now measured on the left and profound hearing loss on the right ear. The patient was treated with cochlea implants on the left and a hearing aid in the right ear. The hearing loss is most likely a complication of COVID-19.

Basilar artery occlusion presenting as sudden bilateral deafness: a case report

Background Most sudden-onset hearing loss is due to otolaryngologic- and very rarely to cerebrovascular disease. We report a woman with sudden bilateral sensorineural hearing loss. This case suggests that even in the absence of brainstem or cerebellar signs, magnetic resonance imaging (MRI) and MR angiography (MRA) should be performed since such studies may reveal signs of life-threatening vertebrobasilar artery occlusion. Case presentation A 73-year-old Japanese woman with a history of hypertension, hyperlipidemia, and atrial fibrillation who suffered bilateral deafness with vertigo and vomiting was transferred from a local hospital to our department. On admission her consciousness was clear and vertigo was absent. Neurological examination revealed only bilateral sensorineural hearing loss. Head computed tomography (CT) returned no significant findings. The next morning she gradually developed severe drowsiness. Diffusion-weighted MRI demonstrated acute cerebral infarction in the brainstem and bilateral cerebellum; MRA showed basilar artery occlusion due to a cardioembolic thrombus. Revascularization was obtained by endovascular treatment. However, her condition worsened progressively during the following hours. CT revealed new brainstem lesions, massive cerebellar swelling, and obstructive hydrocephalus. She died on the second day after her admission. Conclusions When hearing loss is due to vertebrobasilar occlusive disease, the prognosis is very poor. We suggest that vertebrobasilar stroke be suspected in patients with bilateral sensorineural hearing loss who present with risk factors for stroke such as atrial fibrillation and other neurologic signs.

Isolated deafness as a presenting symptom in granulomatosis with polyangiitis

Granulomatosis with polyangiitis (GPA) is a rare small vessel vasculitis commonly affecting the lungs, upper respiratory tract and kidneys. It is an idiopathic condition but likely due to an autoimmune process, resulting in granulomatous lesions and glomerulonephritis. Upper respiratory tract involvement is commonly seen in patients with GPA. Our case is that of an elderly lady (Mrs C) presenting with sudden onset bilateral deafness. She was later found to have extensive lower respiratory tract involvement although she was never particularly symptomatic of this. The presentation suggested a single organ disorder and led to some initial diagnostic uncertainty. Imaging and laboratory investigations eventually led to the diagnosis and she was successfully treated with corticosteroids and rituximab with good response and hearing improvement. This case highlights the importance of early diagnosis in a rapidly progressive disease which undetected can lead to catastrophic end organ damage and disability.

Sudden Bilateral Deafness in a Patient with Transient Ischemic Attack: A Case Report

Sudden-onset bilateral cortical deafness is a very rare symptom of stroke, but must be recognized as stroke, as it is a treatable condition, and the treatment is highly time dependent. We report a 53-year-old man with an acute onset of complete bilateral hearing loss that gradually improved spontaneously over 4 h. The hearing loss was explained by an infarction visualized on magnetic resonance imaging, which showed a subacute temporoparietal ischemic lesion in the left cerebral hemisphere involving the insular cortex and an older infarction in the right temporoparietal region. The location of these kinds of lesions may typically not cause motor deficits, but sensory and cognitive (e.g., aphasia) symptoms, which can be challenging to recognize in a suddenly deaf patient. Taking the possible differential diagnoses into account, immediate stroke workup should always be prioritized in patients with sudden bilateral deafness, as acute revascularizing treatment is possible.

Temporal Pitch Perception in Cochlear-Implant Users: Channel Independence in Apical Cochlear Regions

Two-electrode stimuli presented on adjacent mid-array contacts in cochlear-implant users elicit pitch percepts that are not consistent with a summation of the two temporal patterns. This indicates that low-rate temporal rate codes can be applied with considerable independence on adjacent mid-array electrodes. At issue in this study was whether a similar independence of temporal pitch cues can also be observed for more apical sites of stimulation, where temporal cues have been shown to be more reliable than place cues, in contrast to middle and basal sites. In cochlear-implant recipients with single-sided deafness implanted with long lateral-wall electrode arrays, pitch percepts were assessed by matching the pitch of dual-electrode stimuli with pure tones presented to the contralateral normal-hearing ear. The results were supported with an additional pitch-ranking experiment, in a different subject population with bilateral deafness. Unmodulated pulse trains with 100, 200, and 400 pulses per second were presented on three pairs of adjacent electrodes. Pulses were separated by the minimal interchannel delay (1.7 µs) in a short-delay configuration and by half the pulse period in a long-delay configuration. The hypothesis was that subjects would perceive a pitch corresponding to the doubled temporal pattern for the long-delay stimuli due to the summation of excitation patterns from adjacent apical electrodes, if those electrodes were to activate largely overlapping neural populations. However, we found that the mean matched acoustic pitch of the long-delay pulses was not significantly different from that of the short-delay pulses. These findings suggest that also in the apical region in long-array cochlear-implant recipients, temporal cues can be transmitted largely independently on adjacent electrodes.

Profound bilateral deafness complicating aortic arch surgery

Hearing loss is a rare complication of cardiac surgery; bilateral profound deafness has never been reported in this setting. A 45-year-old male presented with profound bilateral sudden deafness following arch surgery and frozen elephant trunk. Patient’s presentation, surgery details and aetiological mechanisms are discussed.