title: Unilateral pathological lesions of paranasal sinuses removed by endoscopic surgery.
abstract: BACKGROUND
  The aim of this study was to analyze the incidence and nature of unilateral pathological lesions of paranasal sinuses in patients who had endoscopic sinus surgery performed in ENT.
  
  
  METHODS
  In the years 2006-2011 endoscopic sinus surgery for unilateral pathological lesions of paranasal sinuses was performed in 1847 patients (838 women and 1009 men). The enrollment of patients was based on the findings of otolaryngological clinical and subjective examinations, assessment of the paranasal sinuses on three-dimensional CT scans, and laboratory examinations. Based on the analysis of medical history data, including gender, age, the type of surgical procedure performed, and histopathological findings the cases were finally analyzed.
  
  
  RESULTS
  Pathological lesions of the paranasal sinuses were localized on the left side in 132 (57%) patients, and on the right side in 100 (43%) patients. Of the 232 patients with unilateral pathological changes, 41.8% subjects underwent endoscopic sinus surgery for polypotic changes in the ethmoid and maxillary sinuses; 28.4% for the maxillary sinus; 10.8% for the ethmoid, maxillary and frontal sinuses; and 8.6% patients for all paranasal sinuses on one side. The number of operations of only one sinus was considerably lower: sphenoid sinus, 4.7%; ethmoid sinus, 2.2%; and frontal sinus, 1.7% patients. The histopathological analysis of unilateral pathological lesions removed by endoscopic surgery showed chronic paranasal sinusitis with polyps in 56.5% patients; chronic paranasal sinusitis in 22.8% patients; and maxillary sinus cyst was confirmed in 11.6% patients. In 5.1% patients inverted papilloma was diagnosed and in 2.2% patients the presence of osteoma was found.
  
  
  CONCLUSIONS
  Unilateral paranasal pathological lesions, leaving aside rather typical maxillary sinus cysts, require a particularly thorough pre-operative diagnosis and a precise histopathological assessment.
authors.affiliation: Department of Otolaryngology and Laryngological Oncology, 2nd Chair of Otolaryngology, Medical University of Lodz, Head: Jurek Olszewski, MD, PhD, Lodz, Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Miłoński
authors.affiliation: Department of Otolaryngology and Laryngological Oncology, 2nd Chair of Otolaryngology, Medical University of Lodz, Head: Jurek Olszewski, MD, PhD, Lodz, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Pietkiewicz
authors.affiliation: Department of Otolaryngology and Laryngological Oncology, 2nd Chair of Otolaryngology, Medical University of Lodz, Head: Jurek Olszewski, MD, PhD, Lodz, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Urbaniak
authors.affiliation: Department of Otolaryngology and Laryngological Oncology, 2nd Chair of Otolaryngology, Medical University of Lodz, Head: Jurek Olszewski, MD, PhD, Lodz, Poland. Electronic address: jurek.olszewski@umed.lodz.pl.
authors.forename: Jurek
authors.initials: J
authors.lastname: Olszewski
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D004724:Endoscopy / Q000379:methods*; D005005:Ethmoid Sinus / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005626:Frontal Sinus / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D015994:Incidence; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D010016:Osteoma / Q000000981:diagnostic imaging / Q000601:surgery; D018308:Papilloma, Inverted / Q000000981:diagnostic imaging / Q000601:surgery; D010254:Paranasal Sinus Diseases / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000473:pathology / Q000601:surgery*; D011859:Radiography; D012189:Retrospective Studies; D013101:Sphenoid Sinus / Q000000981:diagnostic imaging / Q000601:surgery; D055815:Young Adult
keywords: Endoscopic surgery; Paranasal sinuses; Pathological lesions; chirurgia endoskopowa; zatoki przynosowe; zmiany patologiczne