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Background: The distribution of non-Hodgkin lymphoma (NHL) subtypes differs around the world. In this study we aimed to evaluate the gender, age, subtypes, biopsy sites, nodal and extranodal residential area, and stage of disease in the patients with NHL admitted to our hospital between January 2005 and December 2014. Materials and Methods: The records of NHL patients admitted to our hospital between January 2005 and December 2014 were retrospectively reviewed Results: Among 550 patients, 335 patients (60.9%) were male, 215 patients (39.1%) were female. The average age of over all the patients was 56 years (15-95). The average age of women was 57 (15-88), the average age of men was 54 years (15-95). The histological subtypes of NHL patients were as follows: 447 patients (81.3%) B-cell lymphoma, 84 patients (15.2%) T / NK cell lymphoma, 19 patients (3.5%) unclassified subtype. NHL patients divided into subtypes according  to 2001 and  2008 WHO (World Health Organization) Classification and histopathologic subtypes were as follow: Diffuse Large B Cell Lymphoma (DLBCL) 295 patients (53,63%), small lymphocytic lymphoma (SLL) 37 patients (6.7%), Extranodal marginal zone lymphoma (MALT type) 37 patients (6,75%), peripheral T-cell Lymphoma 27 patients (4.9%), mantle cell lymphoma 26 patients (4.72%), Nodal Marginal Zone B-Cell Lymphoma 7 patients (1,3%), follicular lymphoma in 12 patients (2.1%), Burkitt's lymphoma 7 patients (1.3%), Splenic marginal zone B-cell lymphoma 4 patients (0,7). The most common subtype of NHL was DLBCL 295 patients (53,63%). Follicular lymphomas are less common in our center. Extranodal involvement rate was 38,5% of patients. According to the distribution of the sites of extranodal NHLs, the vast majority of patients 43% had GI tract involvement. The most commonly affected GI sites were stomach (27,8%). In this study 22.9% of the patients were in Stage 1, 26.7% in Stage 2, 19.5% in Stage 3, 30.9% in Stage 4 according to Ann- Arbor classification. In conclusion, the characteristics of NHLs in our region s how some differences from other sites of the world. Conclusions: The characteristics of NHL patients vary according to geographical differences.  Present study has revealed the importance of geriatric assessment. NHL was observed frequently in men. Environmental risk factors have to research, epidemiologically.  The most common subtype of NHL was DLBL. Follicular lymphomas are less common in our center. Improvement of national cancer registration system and multicenter large-scale studies reviewing the treatment protocols are needed to ensure the early diagnosis and therapy of NHL.

Güneydoğu Anadolu Bölgesindeki Non-Hodgkin Lenfoma Sınıflaması: 550 Hastanın İncelenmesi