title: [Primary diffuse large B-cell lymphoma of testis: a clinicopathologic study of 14 cases].
abstract: OBJECTIVE
  To study the clinicopathologic features, immunohistochemical findings and prognosis of primary diffuse large B-cell lymphoma (DLBCL) of testis.
  
  
  METHODS
  Fourteen cases of primary DLBCL of testis, diagnosed according to the 2001 World Health Organization staging standards for hematopoietic and lymphoid tumors, were retrospectively studied. Immunohistochemical study was performed and follow-up information analyzed.
  
  
  RESULTS
  The median age of the patients was 62 years. There were 10 patients in stage I, 3 in stage II and 1 in stage IV. Follow-up information was available in 11 patients (78.6%). Three of which were still alive and eight died (with duration of survival ranging from 5 to 19 months). The patients usually presented with unilateral painless enlargement of testis. Histologically, the lymphoma cells of all cases showed a centroblastic appearance. One case belonged to the germinal center B cell-like subtype on immunohistochemical study, while the remaining 13 cases were classified as non-germinal center B cell-like subtype. Ten of the 14 cases (71.4%) showed overexpression of p53 protein. Most cases demonstrated high proliferation index. Six of the 14 cases (42.9%) were positive for bcl-2 protein. The overall 1-year, 2-year and 5-year survival rates were 45.5%, 17.0% and 17.0%, respectively.
  
  
  CONCLUSIONS
  Most cases with primary DLBCL of testis were of peripheral activated B-cell origin. The prognosis is usually not favorable, with propensity of local relapse and systemic dissemination. Accurate pathologic diagnosis relies on detailed histologic examination and immunohistochemical study.
authors.affiliation: Department of Pathology, College of Basic Medicine, Chongqing University of Medical Science, Chongqing 400016, China. ld2002_1@163.com
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Can
authors.initials: C
authors.lastname: Mi
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhao
authors.forename: Ya-lan
authors.initials: YL
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Ma
authors.forename: Yuan-yuan
authors.initials: YY
authors.lastname: Li
authors.forename: Mei-huan
authors.initials: MH
authors.lastname: Xiang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018951:Antigens, CD20 / Q000378:metabolism; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003520:Cyclophosphamide / Q000627:therapeutic use; D003937:Diagnosis, Differential; D004317:Doxorubicin / Q000627:therapeutic use; D005500:Follow-Up Studies; D015972:Gene Expression Regulation, Neoplastic; D018237:Germinoma / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology / Q000601:surgery; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D015260:Neprilysin / Q000378:metabolism; D009919:Orchiectomy; D011241:Prednisone / Q000627:therapeutic use; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D012189:Retrospective Studies; D018239:Seminoma / Q000473:pathology; D015996:Survival Rate; D013736:Testicular Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism; D014750:Vincristine / Q000627:therapeutic use
chemical_list: D018951:Antigens, CD20; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53; D014750:Vincristine; D004317:Doxorubicin; D003520:Cyclophosphamide; D015260:Neprilysin; D011241:Prednisone