121例肠道原发性淋巴瘤临床病理分析

目的研究肠道原发性淋巴瘤的临床病理特点和预后。方法复习121例肠道原发性淋巴瘤临床资料、大体所见、HE切片、免疫组化染色,按2008年WHO造血与淋巴组织肿瘤分类重新进行分类,并用Kaplan-Meier法进行生存分析。结果121例肠道原发性淋巴瘤发病年龄从7～81岁,平均年龄52.7岁,中位年龄55岁。男性88例,女性33例,男女比例8∶3。发病部位分别为大肠（结、直肠）62例（51.2%）,小肠（空、回肠）47例（38.8%）,十二指肠7例（5.8%）,多发部位4例（3.3%）,阑尾1例（0.8%）。临床上以腹痛、腹胀（72.9%）、下消化道出血（22.0%）、发热（10.2%）、腹部包块（8.5%）、腹泻（8.5%）、消瘦（5.1%）等为首发症状。大体上表现为隆起型（37.3%）、溃疡型（33.9%）和浸润型（28.8%）。组织学类型分别为弥漫性大B细胞淋巴瘤,非特殊类型68例（56.2%）,MALT淋巴瘤18例（14.9%）,外周T细胞淋巴瘤,非特殊类型13例（10.7%）,肠病相关T细胞淋巴瘤7例（5.8%）,结外NK/T细胞淋巴瘤,鼻型4例（3.3%）,套细胞淋巴瘤和滤泡性淋巴瘤各3例（2.5%）,ALK阴性的间变性大细胞淋巴瘤2例（1.7%）,慢性淋巴细胞性白血病/小淋巴细胞性淋巴瘤、Burkitt淋巴瘤和不能分类的B细胞淋巴瘤各1例（0.8%）。59例外检病例中共随访39例（66.1%）,随访时间1-102月,平均随访时间19.7月,目前死亡15例。20例失访（未回信或拒绝告知）。结论肠道原发性淋巴瘤以中老年男性多见,最常累及的部位是大肠（结、直肠）,临床表现以腹痛、腹胀多见;最常见的组织学类型是弥漫性大B细胞淋巴瘤,非特殊类型。肠道原发性T细胞淋巴瘤的预后比B细胞淋巴瘤差。     

96例外周T细胞非霍奇金淋巴瘤预后分析

目的：分析外周T细胞淋巴瘤的临床特征、近期疗效、远期生存及预后因素。方法：对96例患者的临床特征、治疗效果及预后因素进行分析。外周T细胞淋巴瘤-非特异型（PTCL-U）66例,间变大细胞性淋巴瘤（ALCL）6例,NK/T淋巴廇（NK/TCL）17例,肠道T细胞性淋巴瘤（ITCL）5例,血管免疫母T细胞性淋巴瘤（AITCL）2例。结果：96例患者中89例接受CHOP方案为主的联合化疗,有效率（RR）为88.8%,完全缓解（CR）率为57.3%。中位随访时间30（2～98）个月,死亡52例,中位生存期31.9个月,1、3、5年生存率分别为83.3%、42.7%、35.1%。多因素分析结果显示,IPI评分是PTCL的独立预后指标（P〈0.05）。结论：外周T细胞淋巴瘤常规化疗近期疗效尚可,但远期生存率低,预后不良,需进一步探索新的治疗策略。     

鼻腔自然杀伤/T细胞淋巴瘤放射治疗的疗效和影响因素

 目的　回顾分析鼻腔自然杀伤（NK）／T细胞淋巴瘤的放射治疗效果,并分析其预后因素。方法　回顾分析9年间接受放射治疗的62例鼻腔NK／T细胞淋巴瘤的临床资料和疗效,单因素分析采用Kaplan-Meier法,多因素分析用COX比例风险模型。结果　全组中位生存时间69.7个月（95 % CI为63.0～78.0个月）,3、5年总生存率分别为66.1 %和46.8 %,远处转移导致治疗失败占61.8 %。T淋巴细胞CD3升高组和降低组的中位生存时间分别为72.6个月和39.6个月,两组比较差异有统计学意义（χ2＝4.9309,P＝0.0264）。多因素分析表明,修正后国际预后指数（IPI）为0～1（χ2＝7.5266,P＝0.0061）、CD3升高（χ2＝9.0912,P＝0.0266）和治疗结束达到CR（χ2＝9.0912,P＝0.0106）是影响鼻腔NK／T细胞淋巴瘤放疗总生存的有利预后因素。结论　放射治疗鼻腔NK／T细胞淋巴瘤疗效肯定,但远处转移治疗失败率高,全身治疗仍具有重要地位;修正后IPI为0～1、CD3升高、治疗结束达到CR是影响鼻腔NK／T细胞淋巴瘤放疗总生存的有利预后因素。     

不同治疗方案对鼻、鼻型NK/T细胞淋巴瘤疗效分析

目的：探讨鼻、鼻型NK/T细胞淋巴瘤的临床特征、治疗方法和预后。方法：收集自2004年1月-2010年1月在我院住院治疗的29例鼻、鼻型NK/T细胞淋巴瘤患者临床资料,分析其临床特点、治疗方案及预后。结果：治疗分CHOP方案组及L-ASP组,总有效率分别为56.3%和75.9%（P=0.045）。两组5年OS率和DFS率分别为43.75%、61.54%（P=0.038）及18.8%、46.15%（P=0.009）,具有统计学意义。难治组7例经VDLP方案补救化疗后总有效率为71.3%。B组症状、临床分期及KPS评分可能对患者的生存产生影响。结论：对于临床早期的鼻、鼻腔NK/T细胞淋巴瘤患者,初治时可以选择CHOP方案治疗,而中、晚期病例及CHOP方案治疗无效的病例,选择以左旋门冬酰胺酶为主的联合化疗结合放疗综合治疗可取得较好疗效。     

血管免疫母细胞性T细胞淋巴瘤的不良预后因素研究进展

血管免疫母细胞性T细胞淋巴瘤（angioimmunoblastic T-cell lymphoma，AITL）是外周T细胞淋巴瘤（peripheral T-cell lymphoma，PTCL）的主要亚型，在国际T细胞淋巴瘤项目中占全部T细胞和NK细胞淋巴瘤的18.5%。AITL临床表现不佳，疾病进展迅速，预后差。由于疾病早期症状不明显，患者诊断时处于临床Ⅲ/Ⅳ期较多。人们对AITL进行不断的研究，也取得一定的进展。在此主要对C反应蛋白、干扰素调节因子-4/多发性骨髓瘤癌基因-1、白细胞介素-10等AITL近年来报道的不良预后因素进行综述。     

新疆维吾尔自治区乌鲁木齐地区466例非霍奇金淋巴瘤临床病理特征分析

 目的　探讨新疆维吾尔自治区乌鲁木齐地区不同民族非霍奇金淋巴瘤（NHL）的临床病理特点。方法　收集466例NHL标本,复查HE和免疫组织化学染色结果,重新诊断、分型。结果　466例中B细胞性NHL 369例（79.2 %）,T细胞性NHL 97例（20.8 %）;结内193例（41.4 %）,结外273例（58.6 %）;最常见组织学类型为弥漫大B细胞淋巴瘤、小淋巴细胞淋巴瘤／慢性淋巴细胞白血病、黏膜相关淋巴组织结外边缘区B细胞淋巴瘤、NK／T细胞淋巴瘤、外周T细胞淋巴瘤、滤泡性淋巴瘤。维吾尔族T淋巴母细胞淋巴瘤（T-LBL）和间变性大细胞淋巴瘤（ALCL）比例分别为7.5 %（9／120）和4.2 %（5／120）,高于汉族的1.3 %（4／308）和2.3 %（7／308）（χ2＝11.276,P＝0.001;χ2＝1.137,P＝0.286）。而汉族结外NK／T细胞淋巴瘤比例为7.1 %（22／308）,高于维吾尔族的3.3 %（4／120）,差异无统计学意义（χ2＝2.196,P＝0.138）。其余各亚型在不同民族间差异皆无统计学意义（均P＞0.05）。结论　乌鲁木齐地区NHL结外发病高于结内,B细胞性淋巴瘤的发病明显高于我国内地。维吾尔族和汉族B-NHL发病构成在整体上差别不大,但是在T细胞NHL中,维吾尔族T-LBL和ALCL高于汉族,而汉族结外NK／T细胞淋巴瘤高于维吾尔族,这些差异是否与新疆维吾尔自治区的民族与地域差异有关,还需要进一步的研究证实。     

31例胃肠道淋巴瘤临床病理学研究

本文分析了31例胃肠道淋巴瘤的临床及病理学研究。男性发病高于女性，平均年龄56．6岁，发生部位以胃最为常见占77％（24／31），小肠、回盲肠及盲肠、大肠各2例，直肠1例，临床症状无特异性。病理学以裂、无裂细胞淋巴瘤多见。对16例采用免疫组化染色证实B细胞性恶性淋巴瘤占94％（5／16），T细胞性恶性淋巴瘤1例为6％。     

原发肠道非霍奇金淋巴瘤32例临床分析

目的研究原发肠道非霍奇金淋巴瘤（NHL）的临床、病理特点,治疗手段和预后因素。方法回顾性分析32例原发肠道NHL患者的临床表现、病理特征和治疗结果。全部数据应用SSPS 10．0软件进行统计处理。结果32例原发肠道NHL患者的发病部位：大肠16例（50．0％）,小肠8例（25．0％）,回盲部6例（18．8％）,多发部位2例（6．2％）。临床表现：腹痛、腹胀26例（81．2％）,腹部肿块14例（43．8％）,腹泻12例（37．5％）,便血10例（31．3％）,消瘦10例（31．3％）,发热8例（25．0％）。本组B细胞型NHL21例（65．6％）,其中弥漫大B细胞型（DLBCL）15例（46．9％）;T细胞型NHL10例（31．2％）;组织细胞型1例（3．1％）。32例中,29例患者行手术和（或）化疗,19例（59．4％）获得完全缓解。Cox多因素分析显示,Ⅲ、Ⅳ期、B症状及T细胞型,是影响预后的独立不良因素（P〈0．05）。结论原发肠道NHLI临床表现不特异,弥漫大B细胞型淋巴瘤多发;根治性手术联合化疗为最佳治疗手段;预后与分期、B症状和T细胞型有关。     

鼻外NK/T细胞淋巴瘤21例临床特征及预后分析

目的 探讨鼻外NK/T细胞淋巴瘤的临床特征与预后.方法 对21例鼻外NK/T细胞淋巴瘤的病例资料进行回顾性分析,并复习相关文献.结果 患者以晚期、有B症状、体能状态（ECOG评分）2～4分、国际预后指数（IPI）3～5分和乳酸脱氢酶（LDH）升高者为多,除1例放弃治疗外,20例患者中,完全缓解5例,部分缓解1例,总生存率为30.0％.早期患者疗效较好,2例晚期合并噬血细胞综合征和弥散性血管内凝血的患者预后最差.结论 鼻外NK/T细胞淋巴瘤患者的预后较差,临床分期、ECOG、IPI和LDH是影响预后的主要因素.     

107例鼻型NK/T细胞淋巴瘤临床特点和预后分析

目的分析107例鼻型NK/T细胞淋巴瘤的临床特点,探讨影响预后的因素。方法回顾性分析2002年1月-2010年12月间福建省肿瘤医院收治的107例完整资料的鼻型NK/T细胞淋巴瘤患者,将临床特点及实验室检查结果进行单因素分析,单因素分析有统计学意义的指标纳入多因素分析。结果107例患者男女比例为2.2∶1(74[DK]∶33),年龄9～83岁,中位年龄42岁。原发部位：鼻腔75例（70％）、韦氏环24例（22％）、其他部位8例;伴颈部淋巴结受侵12例（11％）、骨髓侵犯2例;82％为Ann Arbor分期Ⅰ/Ⅱ期; 83%国际预后指数评分为0～1分, 52％伴有B症状。单纯化疗26例、单纯放疗26例、化放疗综合治疗55例。 初治完全缓解率61％,5年生存率47.2%,多因素分析显示年龄、分期、近期疗效是NK/T细胞淋巴瘤的独立预后因素。结论鼻型NK/T细胞淋巴瘤主要侵犯鼻腔和韦氏环,男性多见,常伴B症状,放化疗为其主要治疗手段,年龄、分期、近期疗效可作为预后参考因素。     

99例结外NK/T细胞淋巴瘤预后分析

背景与目的：结外NK/T细胞淋巴瘤的临床及预后存在明显的异质性,以早期病变为主,常见原发灶局部外侵,早期患者放疗为主要治疗手段。本研究旨在分析早期结外NK/T细胞淋巴瘤患者的临床特征、治疗方案、生存预后及可能影响预后的相关因素。方法：收集河北医科大学第四医院2010年1月—2015年12月病理证实的早期NK/T细胞淋巴瘤患者99例,发病平均年龄45.5岁（6~76岁）,男女发病比例2.1∶1;56.6%患者伴有B症状;单纯放疗7例,单纯化疗29例,放化综合治疗63例;中位放疗剂量52 Gy（34~60 Gy）,含左旋门冬酰胺酶或培门冬酶化疗患者73例,不含19例,中位化疗周期为6个（1~12个）。结果：全组患者中位生存时间59.9个月,中位局控时间73.5个月。全组患者1、2和5年总生存率分别为76.8%、68.8%和61.4%;1、2和5年局控率分别为84.5%、81.6%和78.3%;1、2和5年无远处失败生存率分别为83.4%、83.4%和76.8%。单纯放疗或放化疗与单纯化疗比较,5年总生存率为66.0%和47.3%（χ²=4.782,P=0.029）,5年局控率为85.8%和58.7%（χ²=5.949,P=0.015）。不伴原发肿瘤侵犯（primary tumor invasion,PTI）患者与伴有PTI患者比较,5年总生存率为71.5%和55.5%（χ²=4.950,P=0.026）;5年局控率为81.5%和72.0%（χ²=0.983,P=0.321）。全组近期疗效评价达CR者62例（62.6%）,治疗有效率83.8%,疾病控制率85.8%。评价CR患者与非CR患者5年生存率为84.1%和27.6%（χ²=31.566,P=0.000）;5年局控率为92.2%和52.4%（χ²=18.417,P=0.000）。结论：早期结外NK/T细胞淋巴瘤患者单放或放化综合治疗比单纯化疗疗效好,与生存有关的独立预后因素有Ann Arbor分期和乳酸脱氢酶（lactate dehydrogenase,LDH）,与局控有关的独立预后因素仅有LDH。     

Expression of activating natural killer‐cell receptors is a hallmark of the innate‐like T‐cell neoplasm in peripheral T‐cell lymphomas

Peripheral T‐ or natural killer (NK)‐cell lymphomas are rare and difficult‐to‐recognize diseases. It remains arduous to distinguish between NK cell‐ and cytotoxic T‐lymphocyte‐derived lymphomas through routine histological evaluation. To clarify the cells of origin, we focused on NK‐cell receptors and examined the expression using immunohistochemistry in 22 cases with T‐ and NK‐cell neoplasms comprising angioimmunoblastic T‐cell lymphoma, anaplastic lymphoma kinase (ALK)‐positive and ‐negative anaplastic large‐cell lymphomas, extranodal NK/T‐cell lymphoma, nasal type, monomorphic epitheliotropic intestinal T‐cell lymphoma, aggressive NK‐cell leukemia, and other peripheral T‐cell lymphomas. Inhibitory receptor leukocyte immunoglobulin‐like receptor subfamily B member 1 (LILRB1) was detected in 14 (64%) cases, whereas activating receptors DNAM1, NKp46, and NKG2D were expressed in 7 (32%), 9 (41%), and 5 (23%) cases, respectively. Although LILRB1 was detected regardless of the disease entity, the activating NK‐cell receptors were expressed predominantly in TIA‐1‐positive neoplasms (DNAM1, 49%; NKp46, 69%; and NKG2D, 38%). In addition, NKp46 and NKG2D were detected only in NK‐cell neoplasms and cytotoxic T‐lymphocyte‐derived lymphomas including monomorphic epitheliotropic intestinal T‐cell lymphoma. One Epstein‐Barr virus‐harboring cytotoxic T‐lymphocyte‐derived lymphoma mimicking extranodal NK/T‐cell lymphoma, nasal type lacked these NK‐cell receptors, indicating different cell origin from NK and innate‐like T cells. Furthermore, NKG2D expression showed a negative impact on survival among the 22 examined cases, which mainly received the standard chemotherapy regimen (log‐rank test, P = .024). We propose that the presence of activating NK‐cell receptors may provide new insights into understanding peripheral T‐cell lymphomas and characterizing them as innate‐like T‐cell neoplasm.     

The clinical study of extranodal natural killer cell lymphoma, nasal type

To analyze the clinical characteristics, treatment of extranodal NK/T-cell lymphoma, nasal type, the term "nasal type" describes in the nasal cavity and also in the extranasal sites. There were 82 patients with nasal NK/T lymphoma (group 1) and 11 patients with extranasal NK/T lymphoma (group 2). In group 1, 4 patients gave up treatment. Five patients received radiotherapy (RT) alone. Fifty-seven patients were treated with combination of chemotherapy and RT. Sixteen patients received chemotherapy alone. Most patients (82.9%) had stage I/II disease and a high frequency (about one-third) of B symptoms. The CR rate was 53.8%. The OS rate was 62.8% (49/78 cases). Three patients died in relation to L-asparaginase. Three patients with late relapses occurred at 10 and 17 years from CR, respectively. In group 2, except that one patient received chemoradiotherapy, 10 patients received chemotherapy. Seven patients died. The OS rate was 36.4%. Our study suggested that nasal and extranasal variants of extranodal NK/T lymphoma, nasal type represented different clinical behavior and prognosis. For comparison, extranasal NK/T lymphoma is more aggressive and higher mortality than nasal NK/T lymphoma.     

非霍奇金淋巴瘤1012例临床病理分析

目的:了解我院近10年来非霍奇金淋巴瘤(NHL)的发病特点,分析影响NHL预后的相关因素.方法:回顾性分析了近10年来我院收治的1012例NHL患者的临床病理特点,对影响新疆地区NHL生存率及预后的临床病理因素进行分析.结果:1012例NHL中以40～60岁汉族男性发病多见,最主要病理类型依次为弥漫性大B细胞淋巴瘤(DLBCL)346例(34.1%),外周T细胞淋巴瘤(PTCL)185例(18.3%),滤泡淋巴瘤(FL)97例(9.6%),黏膜相关淋巴组织淋巴瘤(MALT)94例(9.3%),NK/T细胞淋巴瘤62例(6.1%),T-淋巴母细胞淋巴瘤(T-LBL)47例(4.6%).结性起病的淋巴瘤619例(61.2%),结外起病的淋巴瘤393例(38.8%).本组维吾尔族女性FL淋巴瘤患者人数比例较汉族女性患者高(P=0.002),汉族男性PTCL患者人数比例高于维吾尔族男性患者(P=0.015).5年总生存率为45.8%.单因素分析显示临床分期,行为状态评分(PS),B症状,年龄,肿块大小,血清乳酸脱氢酶(LDH),结外器官受侵数目及IPI是NHL的预后因素(P＜0.05).多因素分析提示T细胞来源,Ⅲ～Ⅳ临床分期,IPI评分3～5分及LDH增高是NHL独立的预后不良因素(P＜0.05).结论:新疆地区NHL发病以中年多见,结性起病者多于结外起病,B细胞淋巴瘤多于T细胞淋巴瘤.免疫分型、临床分期、IPI、血清LDH水平与NHL预后相关.     

Primary nasal lymphoma,NK/T‐cell type: Report of two cases with similar presentation but different outcome

Two cases of natural killer (NK)/T‐cell primary nasal lymphoma with similar clinical presentations are reported, for comparison and contrast, to highlight the clinical issues and challenges posed by this unusual disease, its aggressiveness being matched only by its rarity. Presenting as a lesion in the nasal cavity with histological features of malignant lymphoma, primary nasal lymphoma is an uncommon extranodal lymphoma, which poses problems in both diagnosis and management. In people of oriental descent, the common cell subtype is NK/T‐cell. Although it is generally thought that combination treatment with chemotherapy and radiation is the best management for early stage non‐Hodgkin's lymphoma (NHL), there is still debate as to whether combined therapy is optimal treatment for this particular subtype of NHL, given that it responds less well to conventional chemotherapy. Herein we report two patients to illustrate these controversies.     

皮肤结外鼻型NK/T细胞淋巴瘤7例临床与病理分析

探讨皮肤结外鼻型NK/T细胞淋巴瘤（extranodal natural killer/T-cell lymphoma,nasal type,ENKTCL-N）的临床特点和组织病理学特征。方法:回顾性分析7例患者的皮疹特点、有无皮肤外损害,并进行临床分期、评价预后及记录实验室检查结果;分析7例病例HE染色的组织病理学特点及免疫组化结果。结果:7例患者中男5例,女2例,平均年龄（41.7±22.7）岁,平均病程31.4（2～48）个月。7例患者中6例（85.7%）患者皮损累及四肢,全部患者皮疹均具有多发性和多形性的特点及慢性溃疡的表现,溃疡大小不一,圆形或椭圆形、深在、边缘整齐;在发现皮肤损害时,6例（85.7%）患者同时有皮肤外损害;7例患者中,4例（57.1%）死亡,3例（42.9%）带瘤生存。6例（85.7%）患者外周血淋巴细胞亚群异常,亦有6例（85.7%）患者EB病毒抗体阳性。皮损处组织病理表现为致密的肿瘤细胞浸润真皮和皮下脂肪,并侵及血管;瘤细胞多数为中等大小,常见核分裂象。免疫组化显示全部患者异型的T细胞相关标志CD45RO/UCHL-1阳性及EB病毒原位杂交阳性,CD56阳性者3例（42.9%）。结论:本病呈多形性、多发性,并以慢性溃疡为主的皮损可能是发现ENKTCL-N的线索,外周血淋巴细胞亚群异常可能对疾病诊断有提示作用,而皮肤组织病理见大量异形淋巴细胞及侵血管现象对诊断很有价值,最后确诊需要结合病理组织、免疫组化。      

原发性肠道非霍奇金淋巴瘤 53例临床预后分析

背景与目的：胃肠道是淋巴瘤最常见的结外侵犯部位。本文对原发性肠道非霍奇金淋巴瘤的临床及病理特征进行分析,探讨各种临床指标与预后的关系。方法：选择1980年1月至2000年1月我院治疗的原发性肠道非霍奇金淋巴瘤共53例,均在我院腹部外科或内科接受手术治疗或化疗并进行随访。应用SPSS10．0软件行生存分析并对各临床指标与预后的关系进行Cox单因素和多因素分析。结果：5年总生存率为49．59％,10年预期总生存率为41．33％。log—rank单因素分析显示病理免疫表型(T／B)、有无B症状、血清乳酸脱氢酶(lactate dehydrogenase,LDH)是否升高、临床分期(包括Musschoff和Rohitiner两种分期法)、PS状态、能否完全切除、肠病灶数等因素都与生存密切相关。而年龄、性别、肿瘤大小和治疗模式与总生存期无关。Cox模型进行多因素分析发现仅病理免疫表型(T或B细胞型)与总生存期有关。结论：原发性肠道非霍奇金淋巴瘤的病理免疫表型是独立的预后危险因素,T细胞性淋巴瘤其临床进程快、疗效及预后差。     

Treatment outcome of front-line systemic chemotherapy for localized extranodal NK/T cell lymphoma in nasal and upper aerodigestive tract

We analysed the treatment outcome of localized extranodal NK/T cell lymphoma initially treated with CEOP-B chemotherapy based on the primary site of involvement (nasal cavity vs. upper aerodigestive tract) and treatment modality (chemotherapy vs. chemotherapy followed by radiotherapy. Forty-three patients newly diagnosed as extranodal NK/T cell lymphoma were analysed: 29 cases from nasal cavity/nasopharynx and 14 from upper aerodigestive tract. Twenty-six patients were treated with chemotherapy alone, while adjuvant radiotherapy was given to 17 patients. Overall response rate to front-line CEOP-B chemotherapy was 67.4% (29/43) and the complete remission (CR) rate was 44.2% (19/43). Median overall and disease-free survival was 26.87 months [95% confidence interval (CI) = 8.71 - 45.03] and 15.27 months (95% CI = 2.92 - 27.62). The responders (CR or partial response) to initial CEOP-B chemotherapy showed longer overall survival than non-responders (P = 0.0026). Local relapse was observed to be higher in the chemotherapy alone group compared to the chemoradiotherapy group. Adjuvant radiotherapy failed to improve survival; thus, the median disease-free survival of the chemotherapy and chemoradiotherapy groups was not different (P = 0.9101). There may be a tendency for better overall survival in group of upper aerodigestive tract lymphoma than the nasal cavity/nasopharynx group (P = 0.0643). However, front-line CEOP-B chemotherapy has a limited role and adjuvant radiotherapy failed to improve survival in localized extranodal NK/T cell lymphoma.     

Ki-67 expression is predictive of prognosis in patients with stage I/II extranodal NK/T-cell lymphoma, nasal type.

BACKGROUND: Localized extranodal natural killer (NK)/T-cell lymphoma, nasal type, commonly has a low or low-intermediate risk of the international prognostic index (IPI), so the IPI has shown inconsistency in predicting prognosis. Thus, we analyzed Ki-67 expression and proposed a new prognostic model including Ki-67 expression for stage I/II extranodal NK/T-cell lymphoma. PATIENTS AND METHODS: We studied Ki-67 expression and its relationship with prognosis in 50 patients with extranodal NK/T-cell lymphoma. RESULTS: The patients were dichotomized by the median value: low (<65%) versus high Ki-67 (> or =65%). High Ki-67 was associated with a worse overall survival (OS; P = 0.021) and disease-free survival (DFS; P = 0.044). In multivariate analysis, Ki-67 expression and primary site of involvement were found to be an independent prognostic factor for OS and DFS (P < 0.05). Based on these results, we proposed a new clinico-pathological prognostic model with Ki-67 expression and the primary site of involvement. It showed a high degree of correlation with worse OS and DFS (P < 0.001). CONCLUSIONS: Ki-67 expression is predictive of prognosis, and our prognostic model may become a useful tool for predicting prognosis in patients with stage I/II extranodal NK/T-cell lymphoma, nasal type.     

T-cell and NK/T-cell lymphomas in southern Taiwan: a study of 72 cases in a single institute

In an attempt to better understand the clinicopathologic features of T- and natural killer (NK)/T-cell lymphomas in Taiwan and the distribution and relative frequency of each subtype according to the new WHO classification, the pathology file of a medical center in southern Taiwan during 1989-2002 was retrospectively searched. The results of light microscopy, immunohistochemistry, in situ hybridization for Epstein-Barr virus (EBER), and T-cell receptor (TCR)-gamma chain gene rearrangement were correlated with clinical findings. A total of 72 cases were identified. They were peripheral T-cell lymphoma, unspecified (PTLu; n = 23, 31.9%), NK/T-cell lymphoma (n = 14, 19.4%), anaplastic large cell lymphoma (n = 13, 18.0%), angioimmunoblastic T-cell lymphoma (AITL; n = 9, 12.5%), precursor T-lymphoblastic lymphoma (n = 8, 11.1%), enteropathy-type intestinal T-cell lymphoma (n = 2, 2.8%), adult T-cell leukemia/lymphoma (n = 2, 2.8%), and subcutaneous panniculitis-like T-cell lymphoma (n = 1, 1.4%). The male to female ratio was 1.5:1. Forty patients (55.6%) had extranodal presentation. Eleven cases including 9 of 14 (64.3%) NK/T-cell lymphomas expressed CD56. All 14 NK/T-cell lymphomas are EBER-positive. Seven of nine (77.8%) AITLs expressed CD10. The overall 5-year survival rate was 10.2%. In conclusion, we have characterized a large series of T- and NK/T-cell lymphomas in southern Taiwan, where there is male predominance and poor prognosis. CD56 is a specific but not very sensitive marker while EBER is most reliable for the diagnosis of NK/T-cell lymphoma. CD10 is a useful marker to differentiate AITL from PTLu.