title: [Clinicopathologic features of granulocytic sarcoma: a study of 38 cases].
abstract: OBJECTIVE
  To study the clinicopathologic features of granulocytic sarcoma.
  
  
  METHODS
  The clinical and pathologic findings of 38 cases of granulocytic sarcoma were retrospectively analyzed. Immunohistochemical study was performed and the literature was reviewed.
  
  
  RESULTS
  The age of patients ranged from 2 to 77 years (mean = 43.3 years). The male-to-female ratio was 1.5:1. Major clinical presentations included superficial lymph node enlargement and painful soft tissue mass. Follow-up data were available in 18 patients; and 14 of them died of tumor-related diseases. The average duration of survival of the patients was 16.9 months. Histologically, the tumor cells were relatively uniform in appearance and small to medium in size. The cytoplasm was scanty and pale in color. The nuclei were round or focally irregular, with fine chromatin and inconspicuous nucleoli. Mitosis figures were readily identified. Scattered immature eosinophilic myelocytes were seen. Immunohistochemical study showed that the tumor cells in all cases expressed MPO and CD43. Most cases were also positive for CD68, lysozyme, CD99 and TdT. The staining for CD3, CD20, CD79a, pan-cytokeratin and PLAP were negative.
  
  
  CONCLUSIONS
  Granulocytic sarcoma is a known histologic mimicker of non-Hodgkin lymphoma, Ewing sarcoma/PNET and embryonal rhabdomyosarcoma. Detailed morphologic examination, when coupled with immunohistochemical study, is useful in arriving at a correct diagnosis.
authors.affiliation: Department of Pathology, Medical School of Nanjing University/Nanjing General Hospital of PLA, Nanjing 210002, China.
authors.forename: Hai-yan
authors.initials: HY
authors.lastname: Liu
authors.forename: Hong-lin
authors.initials: HL
authors.lastname: Yin
authors.forename: Jun
authors.initials: J
authors.lastname: DU
authors.forename: Ying
authors.initials: Y
authors.lastname: Cai
authors.forename: Zhen-feng
authors.initials: ZF
authors.lastname: Lu
authors.forename: Hang-bo
authors.initials: HB
authors.lastname: Zhou
authors.forename: Xiao-jun
authors.initials: XJ
authors.lastname: Zhou
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002051:Burkitt Lymphoma / Q000378:metabolism / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D051917:Leukosialin / Q000378:metabolism; D008198:Lymph Nodes / Q000473:pathology; D008297:Male; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D010051:Ovarian Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D009195:Peroxidase / Q000378:metabolism; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000378:metabolism / Q000473:pathology; D012189:Retrospective Studies; D012512:Sarcoma, Ewing / Q000378:metabolism / Q000473:pathology; D023981:Sarcoma, Myeloid / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D012878:Skin Neoplasms / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D015996:Survival Rate; D055815:Young Adult
chemical_list: D051917:Leukosialin; D009195:Peroxidase