title: Computerized tomography based tumor-thickness measurement is useful to predict postoperative pathological tumor thickness in oral tongue squamous cell carcinoma.
abstract: BACKGROUND
  Tumor thickness has been shown in oral tongue squamous cell carcinoma (OTSCC) to be a predictor of cervical metastasis. The postoperative histological measurement is certainly the most accurate, but it would be of clinical interest to gain this information prior to treatment planning. This retrospective study aimed to compare the tumor thickness measurement between preoperative, CT scan, and surgical specimens .
  
  
  METHODS
  We retrospectively included 116 OTSCC patients between 2001 and 2013. Thickness was measured on computer tomography imaging and again surgical specimens.
  
  
  RESULTS
  The median age was 66 years. 62.8 % of patients were smokers with a mean of 31.4 pack-years. Positive nodal disease was reported in 41.2 %. Mean follow-up time was 33.1 months. The correlation between CT scan-based tumor thickness and surgical specimens based thickness was significant (Spearman rho = 0.755, P < 0.001).
  
  
  CONCLUSIONS
  Tumor thickness assessed by CT scan may provide an accurate estimation of true thickness and can be used in treatment planning.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. maddyy@gmail.com.
authors.forename: J
authors.initials: J
authors.lastname: Madana
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. frederick.laliberte@mail.utoronto.ca.
authors.forename: Frederick
authors.initials: F
authors.lastname: Laliberté
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. gregoiremorand@hotmail.com.
authors.forename: Grégoire B
authors.initials: GB
authors.lastname: Morand
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. deeke32@gmail.com.
authors.forename: Deeke
authors.initials: D
authors.lastname: Yolmo
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. martin.black@mcgill.ca.
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Black
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. alex.mlynarek@mcgill.ca.
authors.forename: Alex M
authors.initials: AM
authors.lastname: Mlynarek
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, Canada, H3T 1E2. michael.hier@mcgill.ca.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Hier
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging / Q000379:methods*; D019647:Oral Surgical Procedures / Q000379:methods*; D011184:Postoperative Period; D011379:Prognosis; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014062:Tongue Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary / Q000601:surgery; D047368:Tumor Burden