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.

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.

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.

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.

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.

Clinicopathological features and prognosis assessment of extranodal follicular dendritic cell sarcoma

AIM: To establish a model for prognosis assessment of extranodal follicular dendritic cell (FDC) sarcoma.METHODS: Nine lesions were examined by routine and molecular approaches.Clinicopathological factors from the new cases and 97 reported cases were analyzed for their prognostic values.RESULTS: The current lesions were found in f ive male and four female patients,located mainly in the head and neck area and averaging 7.2 cm in size.Six patients had recurrence or metastasis and three remained free of disease.The 106 patients (male/female ratio,1.1:1) were aged from 9 to 82 years (median,44 years).The tumor sizes ranged from 1.5 to 21 cm (mean,7.4 cm).Abdominal/pelvic region was affected most frequently (43%).Surgical resection was performed in 100 patients,followed by radiation and/or chemotherapy in 35 of them.Follow-up data were available in 91 cases,covering a period of 3-324 mo (mean,27 mo;median,19 mo).Of the informative cases,38 (42%) had recurrence or metastasis,and 12 (13%) died of the disease.These tumors were classif ied histologically into lowand high-grade lesions.A size ≥ 5 cm (P = 0.003),highgrade histology (P = 0.046) and a mitotic count ≥ 5/10 HPF (P = 0.013) were associated with tumor recurrence.The lesions were def ined as low-,intermediateand high-risk tumors,and their recurrence rates were 16%,46% and 73%,and their mortality rates 0%,4% and 45%,respectively.CONCLUSION: Extranodal FDC tumors behave like soft tissue sarcomas.Their clinical outcomes are variable and can be evaluated according to their sizes and grades.

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.

Primary hepatic follicular dendritic cell sarcoma: A case report

BACKGROUND Follicular dendritic cell sarcoma(FDCS) is an uncommon type of tumor with low incidence. To date,no standard treatment for the disease has been established.Surgery remains the main treatment. Adjuvant chemotherapy and radiotherapy are optional approaches. Metastatic cases require multidisciplinary collaborative treatments. However,the choice of chemotherapeutic drugs is controversial.CASE SUMMARY A 66-year-old Chinese woman presented to our hospital complaining of intermittent pain of right upper quadrant. An enhanced computed tomography(CT) scan of the abdomen revealed hepatocellular carcinoma. Subsequently,the patient underwent a radical partial hepatectomy. Primary FDCS of the liver was diagnosed pathologically. Except for regular follow-up examinations,the patient did not receive adjuvant chemotherapy or radiotherapy. However,fluorine-18-fluorodeoxyglucose positron emission tomography/CT(PET/CT) confirmed lymph node metastases in the space of ligamentum hepatogastricum and pancreatic head,as well as the portacaval space. The patient was given systemic chemotherapy with gemcitabine and docetaxel for she was unsuitable for surgery. Satisfactorily,the metastatic lymph nodes were significantly reduced to clinical complete remission after eight cycles of chemotherapy. Then,strengthened radiotherapy was followed when the patient rejected the opportunity of surgery. Eventually,the carcinoma got better control and the patient was free of progression.CONCLUSION This case highlights the importance of making suitable chemotherapy regimens for the rare tumor. The combination of gemcitabine,docetaxel,and consolidated radiotherapy may offer a new promising option for the treatment of metastatic hepatic FDCS in the future.

Follicular dendritic cell sarcoma detected in hepatogastric ligament:A case report and review of the literature

The most common organ where follicular dendritic cell sarcoma(FDCS) occurs is in cervical lymph nodes, while few cases are found in extranodal organs such as liver, spleen, and soft tissue. This is a case report that FDCS occurs in the hepatogastric ligament. To our knowledge, there is no such case that has been reported previously. A 47-year-old male patient was found to have an intraabdominal mass during an annual physical examination. Computed tomography showed a 4.2 cm × 4.1 cm mass located at the lesser curvature of the stomach, above the pancreas. During operation, a tumor mass was found in the hepatogastric ligament and a radical resection was performed. The tumor was diagnosed as FDCS by pathology and immunohistochemical testing. The patient had a favorable recovery, and no obvious abnormality was found 3 months postoperation.

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。

Two cases of extranodal follicular dendritic cell sarcoma

Follicular dendritic cell (FDC) is an essential component of the nonlymphoid, nonphagocytic immunoaccessory reticulum cells of the peripheral lymphoid tissue(1). FDCs are confined largely to the primary and secondary B-cell follicles, where they form a tight interlacing meshwork. They play a role in the capture and presentation of antigens, generation and regulation of immune complexes. FDCs can be recognized morphologically by their indistinct cellular borders, pale eosinophilic cytoplasm, round-to-ovoid nuclei with delicate nuclear membranes and clear-to-vesicular chromatin with inconspicuous or small nucleoli. FDCs are best identified through immunostaining using CD21, CD35, R4/23, KiM4, KiM4p and Ki-FDC1p. A proliferation of FDCs may be seen in a variety of lesions, including reactive follicular. hyperplasia, Castleman's disease, follicular lymphoma, mantle cell lymphoma, angioimmunoblastic T-cell lymphoma and nodular lymphocyte predominant Hodgkin's lymphoma. Previous studies(2-5) showed that follicular dendritic cell sarcoma (FDCS) affected predominantly the lymph nodes, with occasional extranodal involvement. As the tumor consists mainly ovoid-to-spindle cells, it is not uncommon to misdiagnose the lesion as a wide variety of other spindle cell sarcomas. This study focused on characterizing the histologic features of extranodal FDCS to promote the recognition of this rare entity for both clinicians and pathologists.

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.

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。

纵隔滤泡树突状细胞肉瘤合并卡斯尔曼病1例

患者女,35岁,间断咳嗽、咳痰20天,不伴发热,胸部CT发现纵隔占位;既往体健。查体未见明显异常。胸部CT:中上纵隔偏右5.8 cm×4.6 cm×7.0 cm类圆形团块状软组织肿块,边界清楚,密度均匀,平扫CT值42 HU(图1A);增强扫描动脉期肿块明显不均匀强化,内见斑片状、裂隙状低强化区,CT值74~128 HU(图1B),静脉期呈渐进性强化;病灶下缘见粗大引流静脉,CT值95~136 HU(图1C、1D);纵隔内未见肿大淋巴结;考虑巨淋巴结增生症可能性大。行胸腔镜下纵隔肿物切除术。

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)。

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。

被误诊为非小细胞癌的滤泡树突细胞肉瘤1例并文献复习

滤泡树突细胞肉瘤(FDCS)累及肺部的发生率低,为提高临床医师对该病的认识,本文通过报道1例支气管镜肺活检病理诊断为倾向非小细胞癌,后通过腹股沟淋巴结确诊为FDCS的病例,通过进行文献复习总结累及肺部的FDCS患者的临床特征,发现累及肺部的FDCS患者大部分多有临床症状,主要表现为咳嗽,少部分存在呼吸困难、疼痛等,吸烟可能是其危险因素之一,原发和继发累及肺部的FDCS患者在胸部影像学可能表现不一样,原发多表现为肿块,而继发累及肺部除影像学表现为肿块外,可能合并阻塞性肺炎、胸腔积液、胸膜结节等。该病进行小标本活检容易出现误诊,可能与未检测其特定的免疫组化有关,临床医师需了解其胸部影像学、细胞学、形态学知识,必要时与病理科医师积极沟通,避免出现误诊,延误患者诊治。

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。

扁桃体滤泡树突细胞肉瘤1例并文献复习

目的探讨扁桃体滤泡树突细胞肉瘤的临床和病理特点,提高对其诊治水平。方法运用组织病理学、免疫组化及电镜观察扁桃体滤泡树突细胞肉瘤的特征,总结临床特点和治疗情况,并复习文献加以分析。结果瘤组织常排列成结节状、旋涡状和席纹状,瘤细胞呈梭形合体状,核椭圆形,染色质点彩状,有小核仁。瘤细胞间常混有小淋巴细胞。瘤细胞CD35、S-100、CD68和Vim(+),CKAEl、CKAE3和LCA(-)。电镜下见瘤细胞胞质有多个长突起彼此相连。结论滤泡树突细胞肉瘤是一种少见的低度恶性肿瘤,发生于扁桃体者更为罕见,诊断依赖组织病理学及免疫组化标记。

炎性假瘤样滤泡树突细胞肉瘤6例临床病理特征及预后分析

目的 探讨炎性假瘤样滤泡树突细胞肉瘤（inflammatory pseudotumor-like follicular dendrtic cell sarcoma,IPT-likeFDCS）的临床病理学特征。方法 回顾性分析6例IPT-like FDCS的临床病理资料、免疫表型及EBER原位杂交结果,并追踪患者预后。结果 6例IPT-likeFDCS中女性4例,男性2例,年龄40～78岁,平均62.3岁。临床表现无特异性,4例患者为体检时发现,1例患者有腹胀、消瘦症状,1例患者有腰背部疼痛症状。3例患者肿瘤位于脾脏,2例位于肝脏,1例位于腹膜后。肿瘤直径3.5～14cm（平均7.8cm）,肿瘤通常与周围组织分界较清晰。肿瘤组织由圆形、卵圆形及梭形细胞组成,细胞异型性不明显,呈编织状、漩涡状或席纹状排列,其间见多量炎细胞混杂。免疫表型：肿瘤细胞表达CD21/35、vimentin及Clusterin。EBER原位杂交显示瘤细胞散在阳性。所有患者均经手术完整切除肿瘤,术后随访3～48个月,6例中5例患者无瘤生存,1例患者随访4年后（无复发和转移）失访。结论 IPT-like FDCS是一种好发于女性的少见低度恶性肿瘤,最常见的发病部位是脾脏和肝脏,与EB病毒感染有关,其生物学行为相对惰性,手术完整切除肿瘤是最佳治疗方式。