PMID- 24993330 OWN - NLM STAT- MEDLINE DCOM- 20150528 LR - 20181202 IS - 1879-0887 (Electronic) IS - 0167-8140 (Linking) VI - 112 IP - 1 DP - 2014 Jul TI - The importance of actual tumor growth rate on disease free survival and overall survival in laryngeal squamous cell carcinoma. PG - 119-24 LID - S0167-8140(14)00227-8 [pii] LID - 10.1016/j.radonc.2014.06.004 [doi] AB - BACKGROUND AND PURPOSE: Evaluation of the variation in tumor growth rate and the influence of tumor growth rate on disease free survival (DFS) and overall survival (OS) in laryngeal squamous cell carcinoma (LSCC). MATERIAL AND METHODS: We delineated tumor volume on a diagnostic and planning CT scan in 131 patients with laryngeal squamous cell carcinoma and calculated the tumor growth rate. Primary endpoint was DFS. Follow up data were collected retrospectively. RESULTS: A large variation in tumor growth rate was seen. When dichotomized with a cut-off point of -0.3 ln(cc/day), we found a significant association between high growth rate and worse DFS (p = 0.008) and OS (p = 0.013). After stepwise adjustment for potential confounders (age, differentiation and tumor volume) this significant association persisted. However, after adjustment of N-stage association disappeared. Exploratory analyses suggested a strong association between N-stage and tumor growth rate. CONCLUSIONS: In laryngeal squamous cell carcinoma, there is a large variation in tumor growth rate. This tumor growth rate seems to be an important factor in disease free survival and OS. This tumor growth rate is independent of age, differentiation and tumor volume associated with DFS, but N-stage seems to be a more important risk factor. CI - Copyright (c) 2014 Elsevier Ireland Ltd. All rights reserved. FAU - van Bockel, Liselotte W AU - van Bockel LW AD - University Medical Centre Utrecht, Department of Radiation Oncology, The Netherlands. Electronic address: l.w.vanbockel@umcutrecht.nl. FAU - Verduijn, Gerda M AU - Verduijn GM AD - Erasmus Medical Centre, Department of Radiation Oncology, Rotterdam, The Netherlands. Electronic address: g.verduijn@erasmusmc.nl. FAU - Monninkhof, Evelyn M AU - Monninkhof EM AD - University Medical Centre Utrecht, Julius Center for Health Sciences and Primary Care, The Netherlands. Electronic address: e.monninkhof@umcutrecht.nl. FAU - Pameijer, Frank A AU - Pameijer FA AD - University Medical Centre Utrecht, Department of Radiology, The Netherlands. Electronic address: f.a.pameijer@umcutrecht.nl. FAU - Terhaard, Chris H J AU - Terhaard CH AD - University Medical Centre Utrecht, Department of Radiation Oncology, The Netherlands. Electronic address: c.h.j.terhaard@umcutrecht.nl. LA - eng PT - Journal Article DEP - 20140630 PL - Ireland TA - Radiother Oncol JT - Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology JID - 8407192 SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Carcinoma, Squamous Cell/mortality/*pathology/*radiotherapy MH - Disease Progression MH - Disease-Free Survival MH - Female MH - Humans MH - Laryngeal Neoplasms/*diagnostic imaging/mortality/*pathology MH - Male MH - Middle Aged MH - Neoplasm Staging MH - Prognosis MH - Retrospective Studies MH - Risk Factors MH - Tomography, X-Ray Computed MH - *Tumor Burden OTO - NOTNLM OT - DFS OT - Doubling time OT - Growth rate OT - Laryngeal carcinoma OT - OS OT - Outcome EDAT- 2014/07/06 06:00 MHDA- 2015/05/29 06:00 CRDT- 2014/07/05 06:00 PHST- 2012/07/11 00:00 [received] PHST- 2014/05/30 00:00 [revised] PHST- 2014/06/02 00:00 [accepted] PHST- 2014/07/05 06:00 [entrez] PHST- 2014/07/06 06:00 [pubmed] PHST- 2015/05/29 06:00 [medline] AID - S0167-8140(14)00227-8 [pii] AID - 10.1016/j.radonc.2014.06.004 [doi] PST - ppublish SO - Radiother Oncol. 2014 Jul;112(1):119-24. doi: 10.1016/j.radonc.2014.06.004. Epub 2014 Jun 30.