title: [Testicular lymphoma: a clinicopathological study of 65 cases].
abstract: OBJECTIVE
  To summarize the clinicopathological features of testicular lymphomas (TL).
  
  
  METHODS
  The medical records of 65 patients diagnosed with TL between 2008.1.1 and 2014.11.30 were retrospectively reviewed.
  
  
  RESULTS
  TL was classified as primary (PTL) when there's no prior diagnosis of an extara-testicular lymphoma/leukemia and no concurrent widespread disease, except for the concomitant involvement of ipsilateral inguinal lymph nodes; otherwise it was classified as secondary (STL). Of our patients group, 46 (70.8%) cases were classified primary TL as and the other 19 (29.2%） cases were secondary TL. All patients presented with painless testicular swelling. The median age of STL was significantly younger than that of PTL [65 (12-88) ys vs 13 (1-75) ys, P<0.001]. Additionally, a striking difference in the distribution of histological subtypes was observed between the PTL and STL patients group.
  
  
  CONCLUSIONS
  Primary TLs were more common than secondary. Striking differences in the distribution of patients'age and histology were found between STL and PTL.
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Bao
authors.initials: B
authors.lastname: Nie
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Liu
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Cuiling
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Zifen
authors.initials: Z
authors.lastname: Gao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008198:Lymph Nodes / Q000473:pathology; D008223:Lymphoma / Q000145:classification / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013736:Testicular Neoplasms / Q000145:classification / Q000473:pathology*; D055815:Young Adult