Premium
Low expression of pRB predicts disease relapse in early glottic cancer treated with transoral laser microsurgery
Author(s) -
Lee LiAng,
Fang TuanJen,
Li HsuehYu,
Huang ChungGuei,
Chen TseChing,
Liao ChunTa,
Kang ChungJan,
Chang KaiPing,
Yen TzuChen
Publication year - 2019
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.27612
Subject(s) - medicine , hazard ratio , cordectomy , transoral laser microsurgery , immunohistochemistry , oncology , tissue microarray , biomarker , univariate analysis , stage (stratigraphy) , proportional hazards model , retrospective cohort study , cancer , multivariate analysis , pathology , head and neck cancer , confidence interval , biology , paleontology , biochemistry
Objectives/Hypothesis To elucidate the associations among the immunohistochemical expression of tumor markers, clinicopathological variables, and disease‐free survival (DFS) in patients with early‐stage glottic squamous cell carcinoma (SCC) who underwent transoral laser microsurgery (TLM) as the primary treatment. Study Design Retrospective chart review. Methods The records of consecutive patients with Tis‒T2N0 glottic SCC who underwent TLM between August 1, 2012 and October 31, 2015 were reviewed. Expression of Bcl‐2, pRB, p16 INK4A , p53, c‐Myc, E‐cadherin, and EGFR was examined using tissue microarrays containing tumor specimens through immunohistochemistry. Three‐year DFS rates were calculated. Results A total of 65 consecutive patients were identified, of which 28 were excluded due to insufficient tissue (n = 22) and low biomarker quality (n = 6). Therefore, 37 patients with complete records were included. The included patients were significantly older and had a more advanced type of cordectomy than did the excluded patients ( P = .015 and .009, respectively). According to the findings of univariate analysis, age, betel quid chewing, type of cordectomy, BCL‐2 expression, and pRB expression significantly predicted 3‐year DFS. According to the findings of multivariate analysis, age (adjusted hazard ratio: 0.94, 95% CI: 0.88‐1.00), betel quid chewing (adjusted hazard ratio: 5.07, 95% CI: 1.32‐19.44), and pRB expression (adjusted hazard ratio: 0.02, 95% CI: 0.00‐0.28) were independent predictors of 3‐year DFS. Conclusions Low pRB expression is a potential biomarker for predicting disease relapse after primary TLM for early‐stage glottic SCC and may help to identify high‐risk patients who can subsequently undergo intensive management. Level of Evidence 4 Laryngoscope , 129:E220–E226, 2019