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OBJECTIVE To define a complication of the translabyrinthine surgical approach to the posterior fossa related to a rare variant of the anterior inferior cerebellar artery (AICA) that penetrated into the petrous temporal bone. PATIENT A healthy 59-year-old male with a unilateral sporadic vestibular schwannoma. INTERVENTION The patient elected to undergo a translabyrinthine approach for resection of a vestibular schwannoma. An aberrant loop of AICA was encountered during the temporal bone dissection within the petrous portion of the temporal bone. OUTCOMES The patient suffered a presumed ischemic insult resulting in a fluctuating ipsilateral facial paresis and atypical postoperative nystagmus. RESULTS MRI demonstrated an ischemic lesion in the vascular distribution of the right anterior-inferior cerebellar artery, including the lateral portion of the right cerebellar hemisphere, middle cerebellar peduncle, and bordering the right cranial nerve VII nucleus. His functional recovery was excellent, essentially identical to the anticipated course in an otherwise uncomplicated surgery. CONCLUSIONS This case highlights the irregular anatomy of the AICA as well as the importance of thorough neurological exams in the postsurgical lateral skull base patient.

Chronic rhinosinusitis (CRS) is a heterogeneous disease process with a complex underlying cause. Improved understanding of CRS pathophysiology has facilitated new approaches to management of the patient with CRS that rely on targeting patient-specific characteristics and individual inflammatory pathways. A more personalized approach to care will ultimately incorporate a combination of phenotypic and endotypic classification systems to guide treatment. This review summarizes current evidence with respect to CRS phenotypes and endotypes, as well as the identification of potential biomarkers with potential to guide current and future treatment algorithms.

Foreign body ingestion is a common reason for visiting the emergency room. Foreign bodies can lodge anywhere in the upper aerodigestive tract and can sometimes be difficult to extract. Wire bristles that dislodge from grill-cleaning wire brushes and which are then accidentally swallowed can be particularly challenging to remove due to their small size, propensity to become embedded, and their ability to migrate through tissues. This case reveals the speed with which wire bristle foreign bodies can migrate through tissues and exemplifies the need to obtain computerized tomography evaluations in close proximity to any planned attempt to remove them.

Known complications of acute bacterial rhinosinusitis include retropharyngeal abscess, cavernous sinus thrombosis, intracranial abscess, and associated sequelae. We describe the case of a patient with longus colli abscess formation resulting from acute pansinusitis, complicated by bilateral cavernous sinus thrombosis in the setting of concurrent viral pneumonitis, severe sepsis, and a large area cerebral infarction. The bilateral longus colli abscesses were drained via stereotactic image-guided endonasal sinus surgery, yielding Staphylococcus hominis in culture. The described disease progressed rapidly over a 2-week course amid the COVID-19 pandemic.

Background Aspirin-exacerbated respiratory disease (AERD) is a mechanistically distinct subtype of chronic rhinosinusitis with nasal polyps (CRSwNP). Although frequently associated with type 2 inflammation, literature characterizing the milieu of inflammatory cytokines and lipid mediators in AERD has been conflicting. Objective We sought to identify differences in the upper airway inflammatory signature between CRSwNP and AERD and determine whether endotypic subtypes of AERD may exist. Methods Levels of 7 cytokines representative of type 1, type 2, and type 3 inflammation, and 21 lipid mediators were measured in nasal mucus from 109 patients with CRSwNP, 30 patients with AERD, and 64 non-CRS controls. Differences in inflammatory mediators were identified between groups, and patterns of inflammation among patients with AERD were determined by hierarchical cluster analysis. Results AERD could be distinguished from CRSwNP by profound elevations in IL-5, IL-6, IL-13, and IFN-γ; however, significant heterogeneity existed between patients. Hierarchical cluster analysis identified 3 inflammatory subendotypes of AERD characterized by (1) low inflammatory burden, (2) high type 2 cytokines, and (3) comparatively low type 2 cytokines and high levels of type 1 and type 3 cytokines. Several lipid mediators were associated with asthma and sinonasal disease severity; however, lipid mediators showed less variability than cytokines. Conclusions AERD is associated with elevations in type 2 cytokines (IL-5 and IL-13) and the type 1 cytokine, IFN-γ. Among patients with AERD, the inflammatory signature is heterogeneous, supporting subendotypes of the disease. Variability in AERD immune signatures should be further clarified because this may predict clinical response to biologic medications that target type 2 inflammation.