title: Prognostic significance of tumor-infiltrating lymphocytes in oropharyngeal cancer.
abstract: The presence of tumor-infiltrating lymphocytes has been shown to significantly improve clinical outcomes in many types of cancer. However; their effects on outcomes in patients with oropharyngeal cancer specifically have yet to be elucidated. We conducted a retrospective study in an effort to shed light on this issue. We reviewed the records of 48 consecutively presenting patients with oropharyngeal cancer; and we performed immunohistochemistry to analyze their archived paraffin-embedded tissue samples for the presence of CD3-positive tumor-infiltrating lymphocytes. We also used real-time polymerase chain reaction testing to look for human papillomavirus type 16 (HPV-16) in the tumors. We found that patients with large numbers of tumor-infiltrating lymphocytes (CD3high) had a significantly lower incidence of metastasis at presentation than did those with low numbers of tumor-infiltrating lymphocytes (CD31low) (40.0 vs. 88.5%; p = 0.001), regardless of HPV status. When HPV status was taken into account, the correlation between a high CD3 count and a lower rate of metastasis was maintained in the HPV-positive patients but not in the HPV-negative patients. We also found that the CD3high patients had higher rates of overall survival and disease-free survival at 3 and 5 years than did the CD3low patients; however; these differences only approached but did not reach statistical significance.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Hospital of the University of Pennsylvania, Philadelphia, USA.
authors.forename: Samer
authors.initials: S
authors.lastname: Rajjoub
authors.forename: Suzanne R
authors.initials: SR
authors.lastname: Basha
authors.forename: Eugene
authors.initials: E
authors.lastname: Einhorn
authors.forename: Marc C
authors.initials: MC
authors.lastname: Cohen
authors.forename: Doug M
authors.initials: DM
authors.lastname: Marvel
authors.forename: Duane A
authors.initials: DA
authors.lastname: Sewell
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017252:CD3 Complex / Q000276:immunology*; D017931:DNA Primers / Q000235:genetics; D005260:Female; D006801:Humans; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology* / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009959:Oropharyngeal Neoplasms / Q000235:genetics / Q000276:immunology* / Q000378:metabolism*; D010212:Papilloma / Q000235:genetics / Q000276:immunology* / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D011379:Prognosis
chemical_list: D017252:CD3 Complex; D017931:DNA Primers