title: Prognostic significance of presentation-to-diagnosis interval in patients with oropharyngeal carcinoma.
abstract: OBJECTIVE
  To evaluate the prognostic impact of presentation-to-diagnosis interval (PDI) and its association with other clinical factors in patients with oropharyngeal squamous cell carcinoma (OpSCC).
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  Otolaryngology clinic of an academic medical center.
  
  
  METHODS
  Eighty-seven patients with OpSCC referred to the otolaryngology service at the Johns Hopkins Medical Institutions from March 1994 to August 2001 were included in the study. Selection criteria included confirmed pathological diagnosis of OpSCC, availability of referral record for PDI determination, and no past history of oropharyngeal cancer.
  
  
  METHODS
  The PDI is defined as the time between the patient's first presentation to a medical professional for tumor-related symptoms and the time when the diagnosis of OpSCC was made. The prognostic impact of PDI and its association with other clinical factors were assessed using univariate and multivariate analyses.
  
  
  RESULTS
  Forty percent of patients (35/87) had a PDI of 3 months or longer. Referred otalgia, active smoking status at the time of diagnosis, stage IV disease, and advanced T stage were associated with a poor prognosis. Prolonged PDI itself was not associated with a significant decrease in survival in univariate analysis (hazard ratio, 1.27; P =.52). Furthermore, no significant correlation was found between PDI and N stage, T stage, young age at presentation (<45 years), or tobacco use.
  
  
  CONCLUSIONS
  Difficulty in making the diagnosis of OpSCC is evident by the high proportion of patients with PDI of 3 months or longer. The PDI does not appear to have an impact on survival. Referred otalgia, widely recognized as a strong indicator of invasive head and neck cancer, portends a poor prognosis.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins Medical Institutions, Baltimore, Md, USA.
authors.forename: Tang
authors.initials: T
authors.lastname: Ho
authors.forename: Marianna
authors.initials: M
authors.lastname: Zahurak
authors.forename: Wayne M
authors.initials: WM
authors.lastname: Koch
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000401:mortality*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009959:Oropharyngeal Neoplasms / Q000175:diagnosis* / Q000401:mortality*; D011379:Prognosis; D012189:Retrospective Studies; D013997:Time Factors; D014062:Tongue Neoplasms / Q000473:pathology; D014067:Tonsillar Neoplasms / Q000473:pathology