title: Primary gastrointestinal follicular lymphoma: a clinicopathologic study of 13 cases from Taiwan.
abstract: OBJECTIVE
  Follicular lymphoma (FL) is a common nodal lymphoma. Primary gastrointestinal follicular lymphoma (GIFL) is rare and most commonly occurs in the elder women with indolent clinical course, mainly in the duodenum and terminal ileum. We conducted this study to characterize GIFL in Taiwan.
  
  
  METHODS
  A total of 13 cases were retrospectively collected in 4 hospitals in southern and eastern Taiwan up to 2006. Pathology review and immunohistochemistry were performed and the clinical data were obtained from chart review.
  
  
  RESULTS
  There were 5 men and 8 women with a median age of 58 years (range, 31 to 74; mean, 55). The most frequent site was ileum (7/13, 54%) with 4 tumors in the terminal ileum and the most common symptom was abdominal pain (8/13, 62%). Multiple lymphomatous polyposis was present in 6 patients (46%). Five (45%) of 11 tumors with surgical resection showed transmural involvement. Most of the cases revealed a predominantly follicular pattern (7/13, 54%) and low-grade disease (grades 1 and 2; 10/13, 77%). The tumors expressed CD10 (62%), Bcl-2 (77%), Bcl-6 (77%), and MUM1 (38%). Five patients (38%) were at stage IE and 8 (62%) at stage IIE. Treatment included surgery with or without chemotherapy. All patients achieved complete remission and relapse occurred in 3 patients. At a median follow-up time of 51 months (range, 3 to 180; mean, 63), 11 patients (85%) were disease free and no patient died of lymphoma.
  
  
  CONCLUSIONS
  We characterized the clinicopathologic features of the first series of GIFL in Taiwan. These tumors frequently involved ileum with a favorable prognosis.
authors: Department of Pathology, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
authors: Wan-Ting
authors: WT
authors: Huang
authors: Yung-Hsiang
authors: YH
authors: Hsu
authors: Sheau-Fang
authors: SF
authors: Yang
authors: Shih-Sung
authors: SS
authors: Chuang
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000328:Adult; D000368:Aged; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology / Q000473:pathology* / Q000628:therapy; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007082:Ileum / Q000473:pathology; D008224:Lymphoma, Follicular / Q000453:epidemiology / Q000473:pathology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D011379:Prognosis; D012074:Remission Induction; D012189:Retrospective Studies; D013624:Taiwan / Q000453:epidemiology