Objectives Evaluate tumor histology as prognostic factor in terms of disease-free survival (DFS) and overall survival (OS) in a retrospective cohort of patients with LACC in a reference center.
Methods Records of patients treated with concurrent chemoradiation at Instituto Nacional de Cancerología of Mexico with confirmed cervical cancer stages IB2-IVA were reviewed. A descriptive and comparative analysis was conducted. DFS and OS were calculated for each histology with the Kaplan-Meier method and compared with Log-rank test, results were considered statistically significant if p<0.05.
Results From 2005 to 2014 a total of 1065 records were retrieved, clinical stages were IB2 76 (7.1%), IIA1 23 (2.2%), IIA1 21 (2%), IIB 597 (56.1%), IIIA 27 (2.5%), IIIB 273 (25.6%), IVA 48 (4.5%) of which 917 (86.1%) had Squamous Cell Carcinoma(SCC), 105 (9.9%) Adeno Carcinoma(AC), 7 (0.7%) Adeno Squamous Carcinoma (ASC), and 36 (3.4%) other histologies. Twenty-four (2.3%) were well differentiated, 778 (73.1%) moderately, and 263 (24.6%) poorly differentiated tumors. Mean Disease-free survival for SCC was 10 years, 9 for AC, and 6.9 for ASC, without a statistically difference (p=0. 365), same findings occurred for OS, mean survival was 11 years, not finding impact of histology (p=0.89). Well differentiated tumors had OS of 100% at 5.8 years which was statistically better when compared with other grades (p=0.032).
Conclusions DFS and OS were comparable among different tumor histologies and was considerably better in well differentiated tumors, other factors should be considered.
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