Inflammatory pseudotumor-like follicular dendritic cell sarcoma: A brief report of two cases

BACKGROUND Follicular dendritic cell(FDC)sarcoma/tumor is a rare malignant tumor of follicular dendritic cells,which is considered a low-grade sarcoma that can involve lymph nodes or extranodal sites.Conventional FDC sarcomas are negative for Epstein-Barr virus(EBV),whereas the inflammatory pseudotumorlike variant consistently shows EBV in the neoplastic cells.CASE SUMMARY We report two cases of inflammatory pseudotumor-like FDC sarcoma in the liver that received 3D laparoscopic right hepatectomy and open right hepatectomy separately.CONCLUSION EBV probe-based in situ hybridization and detection of immunohistochemical markers of FDC play an important role in the diagnosis and differential diagnosis of inflammatory pseudotumor-like FDC sarcoma.Complete surgical excision combined with regional lymphadenectomy may be effective in reducing the postoperative recurrence and metastasis and improving long-term survival rates.

Imaging findings of inflammatory pseudotumor-like follicular dendritic cell tumors of the liver:Two case reports and literature review

BACKGROUND Inflammatory pseudotumor-like follicular dendritic cell(IPT-like FDC)tumors of the liver is an uncommon tumor with extremely low incidence.To date,the radiologic findings of this tumor in multiphase computed tomography(CT)and magnetic resonance imaging(MRI)imaging have not been described.CASE SUMMARY Patient 1 is a 31-year-old Chinese female,whose complaining incidentally coincided with the finding of multiple liver masses.In the local hospital,an abdominal enhanced CT found two hypo-dense solid lesions,with heterogeneous sustained hypoenhancement,in the upper segment of the liver’s right posterior lobe.In our hospital,enhanced magnetic resonance imaging(MRI)with hepatocyte-specific contrast agents showed a similar enhanced pattern of lesions with patchy hyperintensity in the hepatobiliary phase(HBP).The patient underwent surgery and recovered well.The final pathology confirmed an IPTlike FDC tumor.No recurrence was found on the regular re-examination.Patient 2 is a 48-year-old Chinese male admitted to our hospital for a huge unexpected hepatic lesion.A dynamic enhanced abdominal CT revealed a huge heterogeneous enhanced solid tumor in the right lobe of the liver with a size of 100 mm×80 mm,which showed a heterogeneous sustained hypoenhancement.In addition,enlarged lymph nodes were found in the hilum of the liver.This patient underwent a hepatic lobectomy and lymph node dissection.The final pathology confirmed an IPT-like FDC tumor.No recurrence was found upon regular re-examination.CONCLUSION When a hepatic tumor shows heterogeneous sustained hypoenhancement with a patchy enhancement during HBP,an IPT-like FDC tumor should be considered in the differential diagnosis.

Intra-abdominal inflammatory pseudotumor-like follicular dendritic cell sarcoma associated with paraneoplastic pemphigus: A case report and review of the literature

BACKGROUD Follicular dendritic cell(FDC)sarcomas are rare neoplasms that occur predominantly in the lymph nodes.They can also occur extranodally.Extranodal FDC sarcomas most commonly present as solitary masses.Inflammatory pseudotumor(IPT)-like FDC sarcomas,a subcategory of FDC sarcomas,are rarer than other sarcoma subtypes.They are composed of spindle or ovoid neoplastic cells and exhibit an admixture of plasma cells and prominent lymphoplasmacytic infiltration.Paraneoplastic pemphigus(PNP),also known as paraneoplastic autoimmune multiorgan syndrome,is a rare autoimmune bullous disease that is associated with underlying neoplasms.PNP has a high mortality,and its early diagnosis is usually difficult.CASE SUMMARY We describe a 27-year-old woman who presented with stomatitis,conjunctivitis,and skin blisters and erosions as her first symptoms of PNP with an intraabdominal IPT-like FDC sarcoma.The patient underwent surgical tumor resection and received tapering oral corticosteroid treatment.She showed no recurrence at the 1-year follow-up.CONCLUSION IPT-like FDC sarcomas are rare underlying neoplasms that have an uncommon association with PNP.PNP-associated FDC sarcomas predominantly occur in intra-abdominal sites and suggest a poor prognosis.Surgical resection is an essential and effective treatment for PNP and primary and recurrent FDC sarcomas.

Surgical treatment of liver inflammatory pseudotumor-like follicular dendritic cell sarcoma: A case report

BACKGROUND Inflammatory pseudotumor-like follicular dendritic cell sarcoma(IPT-like FDCS)is rare with a low malignant potential.Hepatic IPT-like FDCS has similar clinical features to hepatocellular carcinoma(HCC),making it extremely difficult to distinguish between them in clinical practice.We describe the case of a young female patient diagnosed with HCC before surgery,which was pathologically diagnosed as IPT-like FDCS after the left half of the liver was resected.During 6 mo of follow-up,the patient recovered well with no signs of recurrence or metastasis.CASE SUMMARY A 23-year-old female patient with a 2-year history of hepatitis B presented to the Affiliated Hospital of Guizhou Medical University.She was asymptomatic at presentation,and the findings from routine laboratory examinations were normal except for slightly elevated alpha-fetoprotein levels.However,ultrasonography revealed a 3-cm diameter mass in the left hepatic lobe,and abdominal contrastenhanced computed tomography revealed that the tumor had asymmetrical enhancement during the arterial phase,which declined during the portal venous phase,and had a pseudo-capsule appearance.Based on the findings from clinical assessments and imaging,the patient was diagnosed with HCC,for which she was hospitalized and had undergone laparoscopic left hepatectomy.However,the tumor specimens submitted for pathological analyses revealed IPT-like FDCS.After surgical removal of the tumor,the patient recovered.In addition,the patient continued to recover well during 6 mo of follow-up.CONCLUSION Hepatic IPT-like FDCS is difficult to distinguish from HCC.Hepatectomy may provide beneficial outcomes in non-metastatic hepatic IPT-like FDCS.

Inflammatory pseudotumor-like follicular dendritic cell sarcoma:Literature review of 67 cases

Inflammatory pseudotumor(IPT)-like follicular dendritic cell(FDC)sarcoma is rare.The 2017 World Health Organization classification of tumors of hematopoietic and lymphoid tissues noted that data on its clinical outcome are limited,but that the tumor appears to be indolent.The aim of this study was to summarize the clinical characteristics,treatment outcomes,and prognostic factors for IPT-like FDC sarcoma.A literature review was conducted on retrospective analyses of clinical data and prognostic information on IPT-like FDC sarcoma reported between 2001 and 2020.A total of 67 cases of IPT-like FDC sarcoma were retrieved from the literature,documenting that it occurs predominantly in middle-aged adults,with a marked female predilection.Six patients had a separate malignancy and five had an autoimmune disease.Typically involving the spleen and/or liver,it may also selectively involve the abdomen,gastrointestinal tract,pancreas,retroperitoneum,and mesentery.Necrosis,hemorrhage,noncaseating epithelioid granulomas,and fibrinoid deposits in blood vessel walls are often present.The neoplastic cells are predominantly positive for follicular dendritic cell markers such as cluster of differentiation 21(CD21),CD23,CD35 and CNA.42 and are consistently Epstein-Barr virus(EBV)-positive.Mitoses were very rare in most cases.Most patients were treated by surgery alone.Disease status at the time of last follow-up was known for 57 patients with follow-up time ranging from 2 to 144 mo.Local and/or distant recurrence after initial treatment was seen in 15.8%of the patients.The 1-and 5-year progression-free survival for the entire group was 91.5%and 56.1%,respectively.Kaplan-Meier and multivariate analyses showed that age,sex,tumor size,and pathological features were not risk factors for disease progression.IPT-like FDC sarcoma appears to be mildly aggressive and requires annual surveillance.Surgery is the most effective treatment modality,and the role of adjuvant chemotherapy for postoperative management is unclear.EBV is likely to play an important role in the etiology of IPT-like FDC sarcoma.

Follicular dendritic cell sarcoma of the liver:unusual presentation of a rare tumor and literature review

BACKGROUND:Hepatic follicular dendritic cell (FDC) sarcoma is an extremely rare neoplasm.Most commonly,FDC sarcoma presents as a solitary mass in lymph nodes,however,several extra-nodal locations have been identified.METHODS:We report a case of a 53-year-old female who presented with symptoms of abdominal pain,fever,anemia,and jaundice.After an extensive review of the literature,we have found only 12 cases of hepatic FDC sarcoma.RESULTS:The tumor was 11.5 cm in diameter and composed of spindle and epithelioid cells with ovoid nuclei and associated with mixed inflammatory infiltrate.Immunohistochemical stains were positive for CD35 and CD21.The patient underwent a left hepatic lobectomy.CONCLUSIONS:Liver follicular dendritic cell sarcoma is a very rare tumor.Most cases present with abdominal pain and weight loss,and most of them can be managed by hepatic resection with excellent short-term outcomes.

Feasibility of laparoscopic isolated caudate lobe resection for rare hepatic mesenchymal neoplasms

BACKGROUND Mesenchymal tumors such as perivascular epithelioid cell neoplasm(PEComa)and inflammatory pseudotumor-like follicular dendritic cell sarcoma(IPT-like FDC sarcoma)are relatively uncommon in the liver and are particularly rare in the caudate lobe.The clinical manifestations and available imaging tests lack specificity for hepatic mesenchymal tumors.To the best of our knowledge,no caudate PEComa or IPT-like FDC sarcoma has been completely resected by laparoscopy.The standard laparoscopic technique,surgical approaches,and tumor margins for potentially malignant or malignant caudate mesenchymal tumors are still being explored.AIM To assess both the safety and feasibility of laparoscopic resection for rare caudate mesenchymal neoplasms.METHODS Eleven patients who underwent isolated caudate lobe resection from 2003 to 2017 were identified from a prospective database.Three consecutive patients with rare caudate mesenchymal tumors underwent laparoscopic resection.Patient demographic data,intraoperative parameters,and postoperative outcomes were assessed and compared with the open surgery group.RESULTS All procedures for the three resection patients with caudate mesenchymal tumors were completed using a total laparoscopic technique by two different approaches.The average operative time was 226 min,and the estimated blood loss was 133 mL.The average length of postoperative hospital stay was 6.3±0.3 d for the laparoscopy group and 15.5±2.3 d for the open surgery group(P<0.05).There were no perioperative complications or patient deaths in this series.CONCLUSION Laparoscopic isolated caudate lobe resection for rare mesenchymal neoplasms is a feasible and curative surgical option in selected patients.

肝脏滤泡树突状细胞肉瘤的MRI特征

目的:探讨肝脏滤泡树突状细胞肉瘤(FDCS)的MRI特征。方法:回顾性分析7例经手术及病理证实的肝脏FDCS的术前MRI表现特征。MRI图像分析包括观察病灶部位、大小、形态、边缘、病灶内囊变、出血、脂肪,平扫信号、强化方式和其他伴随征象,有无肝包膜回缩,邻近胆管有无扩张、肝门区及腹膜后有无淋巴结转移等征象。结果:7个病灶均为肝内单发类圆形或椭圆形病灶,边缘清晰光滑,肿瘤实性部分T1WI呈低信号,T2WI呈高信号,DWI呈高信号,ADC图实性部分呈低或稍低信号,2个病灶表现为信号均匀的实性肿块,5个病灶为实性肿块伴有不同程度的囊变,其中1个病灶囊变明显,并见出血。动态增强扫描5个病灶表现为“速升平台型”模式;2个病灶表现为“速升缓降型”模式;1个病灶周围异常灌注,2个病灶见延迟强化的包膜;1个病灶周围胆管轻度扩张,所有病例肝门区及腹膜后未见肿大淋巴结。结论:肝脏FDCS的MRI表现有一定的特征,多表现为边界清楚的肿块,常伴有不同程度囊变,实性部分信号均质,动脉期均呈明显强化,多数表现为明显持续强化。

EBV阳性炎性滤泡树突状细胞肉瘤9例临床病理特征

目的探讨EBV阳性炎性滤泡树突状细胞肉瘤(epstein-barr virus-positive inflammatory follicular dendritic cell sarcoma,EBV^(+)IFDCS)的临床病理学特征。方法回顾性分析9例EBV^(+)IFDCS的临床病理特征、免疫表型及随访,行HE及免疫组化EnVision法检测,并复习相关文献。结果9例EBV^(+)IFDCS患者年龄22~78岁,平均44.7岁。7例发生于肝,2例发生于脾。肿瘤内可见血管壁纤维样及透明变性(6/9)、嗜酸性粒细胞浸润(3/9)和上皮样肉芽肿(2/9)。免疫表型:瘤细胞表达滤泡树突状细胞标志物CD21(7/9)、CD23(8/9)和CD35(9/9),部分表达SMA(6/9)和D2-40(1/9)。2例脾IgG4阳性浆细胞明显增高(80~135个/10 HPF),7例肝IgG4阳性浆细胞为0~36个/10 HPF。术后随访3~84个月,6例无瘤生存,2例转移,1例失访。结论EBV^(+)IFDCS罕见,低度恶性。EBER原位杂交和免疫组化检测在EBV^(+)IFDCS诊断和鉴别诊断中具有重要作用。治疗以手术切除为主,术后需长期随访。

Clinical and pathological features of follicular dendritic cell sarcoma of appendix： a case report

Follicular dendritic cell sarcoma （FDCS） is a rare spindle cell neoplasm usually identified as lymph node-based neoplasm that occasionally occurs in extranodal regions. It was first characterized by Monda et al in 1986. In the present report, we describe the first case of FDCS arising from the appendix.

脾脏炎性假瘤样滤泡树突细胞肉瘤影像学表现并文献复习

患者,女,69岁,8个月前无明显诱因出现胃纳差,呈食欲不振,消瘦、体重进行性下降约14斤。专科检查无特殊;实验室检查:白蛋白31.3 g/L;血红蛋白89.00g/L;其余实验室检查及肿瘤标志物均呈阴性。行上腹部CT、MRI及PET/CT,脾脏内前缘见类圆形肿块影,大小为8.2cm×6.9cm×6.5cm,边界清,密度不均(图1A),中央坏死,边缘见假包膜;MRI上T_(1)WI呈等稍高信号T_(2)WI稍高信号,压脂未见信号减低(图2-图4);DWI高信号(图5),ADC值为1.125×10^(-3)mm^(2)/s;呈渐进性强化(图1B-图1D)。

肝脏EBV阳性炎性滤泡树突细胞肉瘤临床病理分析

目的探讨EBV阳性炎性滤泡树突细胞肉瘤的临床病理特征。方法分析1例肝脏EBV阳性炎性滤泡树突细胞肉瘤的临床特点、组织形态学特征及免疫表型,并结合相关文献复习其诊断与鉴别诊断要点。结果患者男性,28岁,体检发现肝脏占位4个月余。镜下示肿瘤与周围肝实质分界清楚,以大量淋巴细胞、浆细胞等炎细胞为背景,梭形肿瘤细胞疏松散在分布。肿瘤细胞边界不清,胞质丰富、嗜伊红染,核圆形或卵圆形,核膜清晰,染色质透亮或呈空泡状,部分可见核膜皱褶、核内假包涵体及小核仁,核分裂象不易见。肿瘤内可见片状或地图样凝固性坏死。免疫组化检测结果显示梭形肿瘤细胞不同程度地表达滤泡树突细胞标记物CD21、CD35、CD23,原位杂交检测结果显示梭形肿瘤细胞EBER呈核阳性,而背景淋巴细胞EBER阴性。Ki-67增殖指数低。该患者行手术完整切除肿物,术后随访至今约14个月,未见复发及转移。结论EBV阳性炎性滤泡树突细胞肉瘤是一种罕见的低度恶性肿瘤,以显著的炎细胞为背景,肿瘤细胞不易识别,认识不足极易误诊,免疫组化及原位杂交检测可协助诊断。

肠息肉样变的炎性假瘤样滤泡树突状细胞肉瘤2例并文献复习

通过对2例以结肠息肉为表现的炎性假瘤样滤泡树突状细胞肉瘤(inflammatory pseudotumor-like follicular dendritic cell sarcoma,IPT-like FDCS)的临床资料、组织学形态、免疫组织化学、原位杂交进行分析,并复习相关文献,探讨IPT-like FDCS的临床病理学特征。病例1,女,50岁;病例2,女,56岁。2例均因粪便潜血试验阳性行肠镜检查时发现肠息肉就诊。镜下肿瘤边界清楚,黏膜表面溃疡,黏膜层和黏膜下层可见由明显的淋细胞和浆细胞浸润而形成的带蒂息肉样病变,肿瘤性的梭形细胞分散于显著的淋巴浆细胞背景中,瘤细胞呈圆形、卵圆形或梭形,细胞质淡染透明,核膜薄,染色质分布均匀,核仁小而清晰。免疫表型:病例1 D2-40阳性。病例2 CD21,CD23、CD35和D2-40均阳性。2例原位杂交Epstein-Barr编码区(Epstein-Barr encoding region,EBER)均阳性。病例1术后随访65个月,病例2术后随访40个月,均预后良好。呈肠息肉样表现的IPT-like FDCS非常罕见。认识本病可避免误诊为其他常见类型的结肠息肉病。EBER和FDC相关免疫组织化学标记在鉴别诊断中起重要作用。

肝脏炎性假瘤与炎性假瘤样滤泡树突状细胞肿瘤的病理学诊断

目的探讨肝脏炎性假瘤及肝脏炎性假瘤样滤泡树突状细胞肿瘤的临床病理学特征及诊断、鉴别诊断要点。方法对肝脏炎性假瘤及肝脏炎性假瘤样滤泡树突状细胞肿瘤各1例进行临床病理分析、免疫组织化学染色及EBV-encoded RNA(EBER)原位杂交检测。结果肝脏炎性假瘤的临床症状包括右上腹不适或疼痛、发热、肝肿大、体重减轻等。大体肿瘤呈实性,境界清楚;镜下肿瘤细胞呈梭形,波浪状排列,其间可见大量淋巴细胞及浆细胞浸润以及散在分布的大的多形性细胞,核仁明显。肝脏炎性假瘤样树突状细胞肿瘤的临床症状、影像学表现及镜下表现均与肝脏炎性假瘤十分相似,但肿瘤细胞边界不清,胞质嗜酸性,除R-S样细胞外,还可见到不少形态怪异的巨细胞,且免疫表型CD21、CD35阳性,EBER(EBV-encoded RNA原位杂交)阳性。结论肝脏炎性假瘤样滤泡树突状细胞肿瘤是罕见的肿瘤,诊断时需注意与肝脏梭形细胞肿瘤甚至霍奇金淋巴瘤鉴别,树突状细胞免疫标记CD21、CD35阳性,特别是EBER原位杂交阳性有助于诊断。

腮腺滤泡性树突状细胞肉瘤1例及文献复习

目的探讨滤泡性树突状细胞肉瘤的病理诊断及鉴别诊断。方法对1例腮腺滤泡性树突状细胞肉瘤进行HE切片、免疫组化等观察,并复习文献进行讨论。结果镜检肿瘤细胞呈梭形、卵圆形、多边形,胞质淡染,边界不清,核染色质颗粒状并见明显小核仁,可见散在核分裂象,呈片状、束状、编织状、旋涡状排列。较多淋巴细胞浸润及围绕血管形成袖套状结构。肿瘤细胞特异性地表达CD21、CD23、CD35、S-100蛋白、CD68、vim entin、EMA。结论滤泡性树突状细胞肉瘤是极少见的低中度恶性肿瘤,可出现多种组织结构,有一定的特征性,确诊需要免疫组化帮助。应与异位脑膜瘤、异位胸腺瘤、恶性纤维组织细胞瘤、淋巴上皮样癌及指突性树突状细胞肿瘤等相鉴别。

肠系膜淋巴结滤泡树突细胞肉瘤1例报告并文献复习

目的探讨滤泡树突细胞肉瘤的临床病理特征、诊断和鉴别诊断。方法对1例肠系膜淋巴结滤泡树突细胞肉瘤进行光镜和免疫组化观察,结合文献进行讨论。结果镜下肿瘤由旋涡状、束状排列的胖梭形、卵圆形或多边形瘤细胞和大量混杂的淋巴细胞组成。免疫表型瘤细胞表达CD35和CD23,弱阳性表达CD68、S-100和EMA;淋巴细胞表达CD45RO和CD3。结论淋巴结滤泡树突状细胞肉瘤是一种罕见的免疫辅助细胞中度恶性肿瘤,其诊断依靠组织病理学和免疫组化,治疗以手术切除为主,必要时辅以化疗和(或)放疗。

小肠系膜淋巴结外滤泡树突状细胞肉瘤

目的 探讨淋巴结外滤泡树突状细胞肉瘤的临床病理学特征和免疫学表型。方法 对 1例发生于小肠系膜的淋巴结外滤泡树突状细胞肉瘤进行光镜观察和免疫组化标记。结果 镜下显示特征性的双相性细胞结构 ,由旋涡状排列的胖梭形、卵圆形或多边性瘤细胞和大量混杂的小淋巴细胞组成。瘤细胞胞界不清 ,呈合体状。胞质淡嗜伊红色 ,核圆形或卵圆形 ,有清晰的核膜 ,染色质呈空泡状或点彩状 ,可见小核仁 ,灶性区域可见分叶状或多核性瘤细胞。瘤细胞核显示轻到中度的异型性 ,可见核分裂象。肿瘤内可见凝固性坏死灶。除与瘤细胞相混杂外 ,部分区域内可见淋巴细胞聚集于血管周围 ,形成袖套结构。免疫表型 :瘤细胞表达CD2 1,弱阳性表达EMA ,而CD35、S 10 0蛋白、desmin和AE1/AE3等标记均为阴性 ,大多数小淋巴细胞表达CD4 5RO(UCHL 1)和CD3。结论 淋巴结外滤泡树突状细胞肉瘤是一种罕见的免疫辅助细胞中度恶性肿瘤 ,应予以完整切除 ,必要时辅以化疗和 (或 )

炎性假瘤样滤泡树突状细胞肿瘤5例临床病理学特征

目的探讨炎性假瘤样滤泡树突状细胞肿瘤(IPT-like FDCT)的临床病理学特征,提高对该病的认识。方法报告5例炎性假瘤样滤泡树突状细胞肿瘤,结合文献分析其临床病理学特征、免疫表型及原位杂交检测EBV转录的核内小RNA(EBER)。结果5例炎性假瘤样滤泡树突状细胞肿瘤患者年龄35~78岁,平均52.6岁,其中女性2例,男性3例。3例肿瘤位于脾,1例位于肝,1例位于腹膜后。肿瘤通常与周围组织分界较清晰。镜下大量淋巴细胞、浆细胞背景中肿瘤细胞呈束状排列或散在分布;瘤细胞呈短梭形,胞质丰富,淡伊红染色,核呈梭形或卵圆形,空泡状,可见核仁,仅有轻度异型性。免疫表型:瘤细胞CD21、CD35及簇蛋白(clusterin)(+),EBER散在(+)。值得注意的是,其中3例伴随有IgG4阳性浆细胞的高表达。所有病例均经手术切除,随访2~96个月,其中1例失访,余4例均未出现复发和转移。结论炎性假瘤样滤泡树突状细胞肿瘤是一种罕见的低度恶性肿瘤,临床病理对其认识不足,易误诊,有必要加强对这种罕见疾病的认识。

肝脏炎性假瘤样滤泡树突状细胞肿瘤1例报告及文献复习

目的:探讨肝脏炎性假瘤样滤泡树突状细胞肿瘤(IPT-like FDCT)的临床病理学特征。方法:对1例肝脏IPT-like FDCT患者(40岁男性,无临床症状,体检时发现肝脏内有占位性病变)的肿瘤组织进行临床病理学、免疫组织化学及行EBV转录的核内小RNA(EBER)原位杂交分析。结果:肿瘤与周围组织间有明显界限,中央可见坏死和出血。炎性背景较突出,主要包含淋巴细胞和浆细胞及少量嗜酸性细胞、中性粒细胞。肿瘤细胞呈束状、席纹状排列,更多的是散在分布于炎细胞间;瘤细胞呈短梭形,胞质丰富,淡伊红染色,核呈梭形或卵圆形,具有异型性且呈空泡状,可见核仁。免疫表型示,瘤细胞表达CD21、CD35和簇蛋白(clusterin),EBER原位杂交阳性。手术切除肿瘤后随访3个月,患者未出现复发和转移。结论:IPT-like FDCT是一种罕见的低度恶性肿瘤,其诊断与鉴别诊断依赖于组织病理学检查及免疫组化标记。

肺转移性滤泡树突细胞肉瘤1例报道并文献复习

目的提高对滤泡树突细胞肉瘤的认识,探讨其系统的治疗方案。方法报告我科收治的1例肺转移性滤泡树突肉瘤的病例并复习国内外文献,对该病例的诊断及治疗方法进行分析。结果本例经2次局部手术、术后放疗及环磷酰胺、多柔比星、长春新碱、泼尼松(CHOP方案)联合化疗后,仍较早出现肺部转移,并进展迅速,行左肺舌段解剖性切除、淋巴结清扫,经病理证实为转移性滤泡树突细胞肉瘤。术后3个月,左肺上叶再次发现转移性肿物。结论滤泡树突细胞肉瘤为罕见肿瘤,其恶性程度高,应重视系统治疗。