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Objective: Warthin's tumours are the second most common benign parotid tumours in the UK. The World Health Organization states that 5-14 per cent of patients have bilateral Warthin's tumours. This study aimed to: assess the presence of contralateral Warthin's tumours in patients who underwent surgery over the past 16 years at a head and neck unit in England, and perform the first systematic literature review on bilateral Warthin's tumours., Methods: A retrospective analysis was conducted on patients diagnosed with Warthin's tumour based on histology between 2005 and 2020. Additionally, a systematic review (International Prospective Register of Systematic Reviews ('PROSPERO') registration number: CRD42022326846) was performed using PubMed and the Cochrane Library., Results: Among 290 patients diagnosed with Warthin's tumours based on histology following surgery, 24.5 per cent had bilateral Warthin's tumours. The systematic review identified 157 papers, with 14 meeting the inclusion criteria., Conclusion: This study revealed that 24.5 per cent of patients had bilateral Warthin's tumours, deviating from the suggested range. These findings are of interest to surgeons discussing the disease with patients.

Paediatric rhinosinusitis (PDRS) is commonly used as a synonym for rhinitis within healthcare. Although they may share common symptoms, the pathophysiology does differ; PDRS is the inflammation of the nasal mucosa in addition to the sinuses whereas rhinitis is the inflammation of just nasal mucosa. This review provides a comprehensive overview of the epidemiology, pathophysiology, symptoms, diagnosis and management of PDRS. There is a greater emphasis on the diagnosis and management of PDRS within this review due to a lack of clear guidelines, which can lead to the common misconception that PDRS can be treated indifferently to rhinitis and other upper respiratory conditions. PDRS has detrimental effects on children's current health, long-term health into adulthood and education. Therefore, having a comprehensive guide of PDRS would provide a greater understanding of the condition as well as improved diagnosis and management. This article primarily focuses on the position of Europe and the United Kingdom; however, the recommendations can be applied to other countries as the causes and treatments would not differ significantly., (Copyright © 2021 The Author(s). Published by Elsevier B.V. All rights reserved.)