Publications by authors named "Papagiannopoulos P"

Introduction: Unilateral sphenoid sinus opacification on computed tomography is caused by a variety of pathologies including inflammatory and infectious sinusitis, benign and malignant tumors, and encephaloceles. The purpose of this study was to report craniofacial pain locations and outcomes in inflammatory unilateral sphenoid sinusitis (USS) patients who underwent endoscopic sinus surgery (ESS).

Methods: A multi-institutional retrospective cohort study was conducted on all adult patients who had ESS for USS from 2015 to 2022.

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Objectives: Endoscopic medial maxillectomy (EMM) is an effective intervention for patients with recalcitrant maxillary sinusitis after previous middle meatal antrostomy. The pathophysiology of refractory maxillary sinusitis is incompletely understood. We aim to identify trends in structured histopathology (SHP) to better understand how tissue architecture changes contribute to refractory sinusitis and impaired mucociliary clearance.

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Objective: Structured histopathology (SHP) is a method of analyzing sinonasal tissue to characterize endotypes of chronic rhinosinusitis with nasal polyps (CRSwNP). Allergic fungal rhinosinusitis (AFRS) shares several features with certain endotypes of CRSwNP. Our objective was to compare the histopathology of AFRS and eosinophilic CRSwNP to further understand whether they are separate endotypes or disease entities altogether.

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Background: Biologics are effective for chronic rhinosinusitis with nasal polyposis (CRSwNP) by reducing type 2 inflammation. Nonresponders often require functional endoscopic sinus surgery (FESS) and represent a challenging population potentially due to non-type 2 pathophysiology. This study characterizes the histopathologic features of biologic nonresponders.

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Purpose: Idiopathic intracranial hypertension (IIH) is a condition of high cerebrospinal fluid (CSF) pressure that presents with CSF leak. The implications of multiple skull base defects (SBD) and associated synchronous CSF leaks have not been previously explored.

Materials And Methods: A dual institutional case-control study examined multiple SBD's and encephaloceles on the risk of CSF leak and postoperative failures post-repair.

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Objective: To analyze clinical and radiographic features that may impact the rate of focal hyperostosis (FH) on computed tomography (CT) for primary and recurrent sinonasal inverted papillomas (IPs) as well as highlight factors that may affect concordance between FH and IP true attachment point (TAP).

Methods: All IPs resected between 2006 and 2022 were retrospectively reviewed. CTs were read by a neuroradiologist blinded to operative details.

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Article Synopsis
  • Sinonasal neoplasms (both benign and malignant) are complex issues for clinicians, highlighting the need for collaboration to improve patient care, as presented in the International Consensus Statement on Allergy and Rhinology: Sinonasal Tumors (ICSNT).
  • The ICSNT document organizes findings into four main sections: general principles, benign neoplasms, malignant neoplasms, and quality of life, covering 48 specific topics and providing evidence-based recommendations and summaries based on their rigor.
  • This comprehensive document reflects a collective effort from an international team to advance understanding and intervention methods for sinonasal neoplasms, while also identifying future research opportunities.
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Article Synopsis
  • Inverted papilloma (IP) is a sinonasal tumor that can become cancerous, and the study investigates the role of human papillomavirus (HPV) in its development.
  • A comprehensive metagenomics assay was used to analyze various tissue samples to identify specific HPV types associated with different stages of IP and related cancers.
  • Results showed a significant increase in the prevalence of HPV-16 and HPV-18, especially HPV-18 E6, correlating with the severity of the disease, suggesting a potential link between HPV and the progression of IP.
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Background: Adult and elderly patients with chronic rhinosinusitis (CRS) undergo similar therapeutic management. Few studies have undertaken sinonasal tissue-level comparisons of these groups. This study examines histopathological differences between adults (>18, <65 years) and the elderly (≥65 years) with CRS, with the goal of optimizing medical management.

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Objective: To explore how diabetes mellitus impacts chronic rhinosinusitis clinically and on structured histopathology to provide insights on new potential chronic rhinosinusitis endotypes.

Study Design: Retrospective cohort study.

Setting: Tertiary academic center.

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 Skull base chordomas are locally aggressive malignant tumors derived from the notochord remnant. There are limited large-scale studies examining the role and extent of surgery and radiation therapy.  Analysis of the National Cancer Database (NCDB) was performed to evaluate the survival outcomes of various treatments, and to assess for predictors of overall survival (OS).

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Objective: This report describes a case of a spontaneous cerebrospinal fluid leak at the jugular foramen that was surgically repaired via the infralabyrinthine approach with adjunct use of intrathecal fluorescein and stereotactic navigation.

Patients: A 39-year-old woman presenting with clear otorrhea confirmed to be cerebrospinal fluid (CSF) emanating from a defect in the jugular foramen.

Intervention: Surgical repair of the skull base defect using an infralabyrinthine approach to the jugular foramen.

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Background/aim: There is significant variation in post-treatment surveillance imaging for sinonasal malignancies. This study examined the utility of surveillance imaging in detecting recurrence in patients treated for sinonasal malignancies.

Patients And Methods: We performed a retrospective review on an IRB-approved dataset of patients with sinonasal malignancies treated at a single institution between 2005 to 2021.

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Background: Adult and pediatric patients with chronic rhinosinusitis (CRS) may have differing philosophies in therapeutic management. Few studies have examined sinonasal tissue-level comparisons of these groups. This study examines histopathologic differences between children and adults with CRS, with the goal of understanding disease pathogenesis and optimizing medical management for both populations.

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Background: Medically refractory chronic rhinosinusitis (CRS) is often treated with functional endoscopic sinus surgery (FESS) and high-volume steroid nasal irrigation. While budesonide is the most common steroid irrigation for this indication, mometasone has a superior pharmacokinetic profile, which may allow dose escalation. The safety and efficacy of mometasone at higher concentrations than previously used in treating CRS have not been explored.

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Objectives/hypothesis: This study offers an update on the epidemiologic and prognostic factors and treatment-specific outcomes in patients diagnosed with sinonasal diffuse large B-cell lymphoma (DLBCL).

Study Design: Retrospective cohort study.

Methods: National Cancer Database was queried from 2004 to 2016 for patients with sinonasal DLBCL.

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Article Synopsis
  • Inverted papilloma (IP) is a sinonasal tumor with the potential to become malignant, and the study aimed to discover associated genes and pathways during its progression to more severe forms like carcinoma-in-situ and invasive carcinoma.
  • A targeted sequencing method was employed to analyze 24 tumors from different stages of progression, leading to the identification of 11 genes that progressively increase in expression from IP to invasive carcinoma.
  • The findings suggest that these genes could improve the accuracy of histological classifications and play a significant role in treatment decisions and patient outcomes, with the potential for earlier identification of risk in future studies.
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Objectives/hypothesis: To identify prognosticators and determine the efficacies of surgery with adjuvant radiotherapy (SR) and surgery with immunotherapy (SI) of head and neck mucosal melanoma (HNMM).

Study Design: Retrospective database study.

Methods: The 2004 to 2017 National Cancer Database was queried for HNMM patients.

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Background: Sinusitis complicated by intracranial or orbital extension can be life-threatening and require emergent intervention. Histologic features of complicated sinusitis have yet to be determined and may have significant implications for understanding pathophysiology.

Methods: A structured histopathology report was utilized to analyze sinus tissue extracted during functional endoscopic sinus surgery (FESS).

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Objectives: To assess patient acceptance of resident involvement in otolaryngologic procedures and to evaluate the impact of a written preoperative educational pamphlet.

Study Design: Prospective cohort study.

Methods: This is a prospective survey study at a large tertiary care academic center.

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