title: Detection of helicobacter pylori in benign laryngeal lesions by polymerase chain reaction: a cross sectional study.
abstract: BACKGROUND
  Although Helicobacter Pylori (HP) was detected in some cases of chronic laryngitis, the results were not confirmed by polymerase chain reaction (PCR). By this time, it has not been found in laryngeal lesions by in house PCR, the most sensitive method for detecting the genome tracks. Regarding the previous results and also few numbers of studies about the presence of HP in benign laryngeal lesions, specifically by PCR, we aimed to investigate the presence of HP in benign laryngeal lesions by in-house PCR.
  
  
  METHODS
  The samples were taken from 55 patients with benign laryngeal lesions and frozen in -20°C. One milliliter (ml) of lysis buffer was added to 100 mg (mg) of each sample and the tube was placed in 56°C overnight. Then DNA extraction was carried out.
  
  
  RESULTS
  To find HP DNA, in-house PCR was performed that revealed 5 positive results among 55 patients with benign laryngeal lesions. Of them, 3 were polyp, 1 was nodule and 1 was papilloma.
  
  
  CONCLUSIONS
  Although the number of positive results was not a lot in this study, it was in contrast with previous studies which could not find any HP tracks in benign laryngeal lesions by other methods. More studies about the prevalence of HP in benign laryngeal lesions improve judging about the effect of this infection on benign laryngeal lesions.
authors.affiliation: Head and Neck Research Center, Hazrat Rasoul Akram Hospital, Tehran University of Medical Sciences, Tehran, Iran. aslanahmadi8931@gmail.com.
authors.forename: Farzad
authors.initials: F
authors.lastname: Izadi
authors.forename: Aslan
authors.initials: A
authors.lastname: Ahmadi
authors.forename: Shadi
authors.initials: S
authors.lastname: Ghourchian
authors.forename: Ahmad
authors.initials: A
authors.lastname: Daneshi
authors.forename: Faramarz
authors.initials: F
authors.lastname: Memari
authors.forename: Ehsan
authors.initials: E
authors.lastname: Khadivi
authors.forename: Shabahang
authors.initials: S
authors.lastname: Mohammadi