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要旨 濾胞性リンパ腫のほとんどはリンパ節原発であるが,節外性の中では消化管とりわけ十二指腸に原発する症例が目立つ.自験例では平均年齢58歳で性差はなく,十二指腸下行脚に主座を持つことが多い.major break pointにおける免疫グロブリン重鎖/bcl-2遺伝子再構成は検出されるが,節性のものに比して臨床病期が低く,大半がWHO分類のGrade 1,2でリンパ腫細胞は中型のものが主体で大型細胞の出現性も節性のそれに比べて低い.病変の進展は総じて緩徐である.VHのusageを検討するとVH4に偏ったusageになっている.このような性格はMALTリンパ腫のそれに近いものである.
The majority of follicular lymphomas are nodal, but some patients have extranodal ones. We previously pointed out that follicular lymphomas are frequently found in the second portion of the duodenum. The average age of the patients was around 58 years old and there was no gender difference. Compared with nodal ones, duodenal follicular lymphomas were of a lower clinical stage, and most cases showed Grade 1 or 2 according to the WHO classification. VH usage in examination samples revealed that its character was similar to that of MALT lymphoma.
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