What may surprise a rhinologist in everyday clinical practice: silent sinus syndrome or pneumosinus dilatans/pneumocele? Literature review and own experience.

Background: The aim of the study was to present rare sinus syndromes known as silent sinus syndrome (SSS) and frontal sinus syndrome with excessive pneumatization and bone defects in the wall (pneumocele). The available literature describing pneumocele cases was reviewed.

Methodology: PubMed and Science Direct databases were searched by two independent reviewers.