Comparison between solid pseudopapillary neoplasms of the pancreas and pancreatic ductal adenocarcinoma with cystic changes using computed tomography

BACKGROUND Solid pseudopapillary neoplasms of the pancreas(SPN)share similar imaging findings with pancreatic ductal adenocarcinoma with cystic changes(PDAC with cystic changes),which may result in unnecessary surgery.AIM To investigate the value of computed tomography(CT)in differentiation of SPN from PDAC with cystic changes.METHODS This study retrospectively analyzed the clinical and imaging findings of 32 patients diagnosed with SPN and 14 patients diagnosed with PDAC exhibiting cystic changes,confirmed through pathological diagnosis.Quantitative and qualitative analysis was performed,including assessment of age,sex,tumor size,shape,margin,density,enhancement pattern,CT values of tumors,CT contrast enhancement ratios,“floating cloud sign,”calcification,main pancreatic duct dilatation,pancreatic atrophy,and peripancreatic invasion or distal metastasis.Multivariate logistic regression analysis was used to identify relevant features to differentiate between SPN and PDAC with cystic changes,and receiver operating characteristic curves were obtained to evaluate the diagnostic performance of each variable and their combination.RESULTS When compared to PDAC with cystic changes,SPN had a lower age(32 years vs 64 years,P<0.05)and a slightly larger size(5.41 cm vs 3.90 cm,P<0.05).SPN had a higher frequency of“floating cloud sign”and peripancreatic invasion or distal metastasis than PDAC with cystic changes(both P<0.05).No significant difference was found with respect to sex,tumor location,shape,margin,density,main pancreatic duct dilatation,calcification,pancreatic atrophy,enhancement pattern,CT values of tumors,or CT contrast enhancement ratios between the two groups(all P>0.05).The area under the receiver operating characteristic curve of the combination was 0.833(95%confidence interval:0.708-0.957)with 78.6%sensitivity,81.3%specificity,and 80.4%accuracy in differentiation of SPN from PDAC with cystic changes.CONCLUSION A larger tumor size,“floating cloud sign,”and peripancreatic invasion or distal metastasis are useful CT imaging features that are more common in SPN and may help discriminate SPN from PDAC with cystic changes.

Solid pseudopapillary tumor of the pancreas:A systematic review of clinical,surgical and oncological characteristics of 1384 patients underwent pancreatic surgery

Background:Pancreatic solid pseudopapillary tumors(SPTs)are rare clinical entity,with low malignancy and still unclear pathogenesis.They account for less than 2%of exocrine pancreatic neoplasms.This study aimed to perform a systematic review of the main clinical,surgical and oncological characteristics of pancreatic SPTs.Data sources:MEDLINE/PubMed,Web of Science and Scopus databases were systematically searched for the main clinical,surgical and oncological characteristics of pancreatic SPTs up to April 2021,in accordance with the preferred reporting items for systematic reviews and meta-analyses(PRISMA)standards.Primary endpoints were to analyze treatments and oncological outcomes.Results:A total of 823 studies were recorded,86 studies underwent full-text reviews and 28 met inclusion criteria.Overall,1384 patients underwent pancreatic surgery.Mean age was 30 years and 1181 patients(85.3%)were female.The most common clinical presentation was non-specific abdominal pain(52.6%of cases).Mean overall survival was 98.1%.Mean recurrence rate was 2.8%.Mean follow-up was 4.2 years.Conclusions:Pancreatic SPTs are rare,and predominantly affect young women with unclear pathogenesis.Radical resection is the gold standard of treatment achieving good oncological impact and a favorable prognosis in a yearly life-long follow-up.

Solid pseudopapillary neoplasm of the pancreas

Solid pseudopapillary neoplasms are rare.This article reviews the clinical and pathologic features of solid pseudopapillary neoplasm of the pancreas,including the epidemiology,cytology,molecular pathology,differential diagnosis,treatment,and prognosis.Solid pseudopapillary neoplasms are low-grade malignant tumours of the pancreas characterized by poorly cohesive epithelial cells with solid and pseudopapillary patterns.Solid pseudopapillary neoplasms occur predominantly in young women.Although solid pseudopapillary neoplasms can occur throughout the pancreas,they arise slightly more frequently in the tail of the pancreas.The aetiology is unknown.Extremely rare cases have been reported in the setting of familial adenomatous polyposis.There are no symptoms unique to solid pseudopapillary neoplasms,however,the most common symptom is abdominal pain or discomfort.The features of solid pseudopapillary neoplasms on computed tomography imaging are indicative of the pathologic changes within the tumour.Typically,well-demarcated masses with variably solid and cystic appearances.Microscopically,these tumours are composed of epithelial cells forming solid and pseudopapillary structures,frequently undergoing haemorrhagic cystic degeneration.Typically,these tumours express nuclear and/or cytoplasmicβ-catenin.Almost all solid pseudopapillary neoplasms harbour mutations in exon 3 of CTNNB1,the gene encodingβ-catenin.The overall prognosis is excellent,and most patients are cured by complete surgical resection.

Solid pseudopapillary tumor of the pancreas in male patients: Report of 16 cases

AIM: To investigate the clinical characteristics, surgical strategies and prognosis of solid pseudopapillary tumors (SPTs) of the pancreas in male patients. METHODS: From July 2003 to March 2013, 116 patients were diagnosed with SPT of the pancreas in our institution. Of these patients, 16 were male. The patients were divided into two groups based on gender: female (group 1) and male (group 2). The groups were compared with regard to demographic characteristics, clinical presentations, surgical strategies, complications and follow-up outcomes. RESULTS: Male patients were older than female patients (43.1 +/- 12.3 years vs 33.1 +/- 11.5 years, P = 0.04). Tumor size, location, and symptoms were comparable between the two groups. All patients, with the exception of one, underwent complete surgical resection. The patients were regularly followed up. The mean follow-up period was 58 mo. Two female patients (1.7%) developed tumor recurrence or metastases and required a second resection, and two female patients (1.7%) died during the follow-up period. CONCLUSION: Male patients with SPT of the pancreas are older than female patients. There are no significant differences between male and female patients regarding surgical strategies and prognosis. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.

Synchronous pancreatic solid pseudopapillary neoplasm and intraductal papillary mucinous neoplasm

Solid pseudopapillary neoplasm (SPN) is a rare and low-grade malignant pancreatic neoplasm composed of poorly cohesive monomorphic neoplastic cells forming solid and pseudopapillary structures with frequent hemorrhagic-cystic degeneration. Intraductal papillary mucinous neoplasm (IPMN) is a pancreatic exocrine tumor composed of intraductal papillary growth of mucin containing neoplastic cells in the main pancreatic duct or its major branches. In the case presented here, a 53-year-old, Japanese man was found to have multiple cystic lesions and dilatation of the main pancreatic duct in the neck of the pancreas. Histological examination revealed a main-duct and branch-duct type IPMN, of the gastric-type, involving the neck of the pancreas, associated with a 0.5 cm SPN in the caudal side of the IPMN. We diagnosed this case as synchronous SPN and IPMN. As far as we know, only one other case of synchronous SPN and IPMN has been reported. Both the present case and the previously reported case showed abnormal nuclear expression of β-catenin in SPN, whereas IPMN showed no abnormal nuclear expression. These results suggest that β-catenin abnormality is not a common pathogenetic factor of synchronous SPN and IPMN.

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas:report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.

SOLID PSEUDOPAPILLARY TUMOR OF THE PANCREAS:CLINICAL AND COMPUTED TOMOGRAPHIC FINDINGS WITH PATHOLOGIC CORRELATION IN 21 CASES

Objective To correlate the clinical and imaging features of the solid pseudopapillary tumor (SPPT) of the pancreas with the pathologic diagnosis. Methods The computed tomographic findings in 21 patients (18 women and 3 men) with pathologically proven solid pseudopapillary tumor of the pancreas were reviewed retrospectively. Two radiologists reviewed images for location, size and morphology, capsule and margin, density, enhancement pattern, calcification, dilatation of pancreatic duct, lymphadenopathy, vascular invasion, distant metastasis, and recurrence. Results On CT, the lesion presented as solitary, round (28.57%), oval (57.14%), or lobulated (14.28%) mass in pancreatic head (47.62%) with complete capsule (85.71%). Lesions smaller than 4cm in maximum diameter (47.62%) presented as predominantly solid mass whereas lesions greater than 4cm in diameter (52.28%) presented as heterogenous mass. On contrast administration, the viable solid portion of the tumor showed mild peripheral enhancement in arterial phase [enhancement degree<20Hounsfield unit (HU)] with progressive fill in during the portal and hepatic parenchyma phase (enhancement degree 20-40HU). Eighteen lesions (85.7%) had complete capsule. Two lesions (9.5%) had areas of high density (>60HU) on plain CT which due to hemorrhage. Dilatation of the pancreatic duct was rare (25%), and distant metastasis, regional lymphadenopathy, and tumor recurrence were absent. Nine patients (42.85%) had an abdominal CT follow-up for 24.55months (range, 2-60months) post-surgery without recurrence or distant metastasis. Conclusion Solid pseudopapillary tumor of the pancreas usually occurs in young females in the pancreatic head or tail. On CT, they manifest as moderate vascular mixed tumor, progressive enhancement of the viable solid portion, distinct tumor margin with capsule formation, and absence of regional lymphadenopathy.

Solid pseudopapillary neoplasm-diagnostic approach and postsurgical follow up:Three case reports and review of literature

BACKGROUND Solid pseudopapillary neoplasm(SPN)is a rare tumor that was first described by Frantz in 1959.Although this tumor is benign,some may have malignant potential that can be predicted based on demographics,imaging characteristics,and pathologic evaluation.This case series presents 3 SPN cases with discussion on gender differences,preoperative predictors of malignancy,and a suggested algorithm for diagnostic approach as well as post-surgical follow up.CASE SUMMARY Three adult patients in a tertiary hospital found to have SPN,one elderly male and two young females.Each of the cases presented with abdominal pain and were discovered incidentally.Two cases underwent endoscopic ultrasound with immunohistochemical staining(which were consistent with SPN before undergoing surgery),and one case underwent surgery directly after imaging.The average tumor size was 5 cm.Diagnosis was confirmed by histology.Two patients had post-surgical complications requiring intervention.CONCLUSION Demographic and imaging characteristics can be sufficient to establish diagnosis for SPN,while malignant cases require pre-operative evaluation with endoscopic ultrasound fine needle aspiration/fine needle biopsy.

胰腺浆液性囊腺瘤误诊病例的MSCT影像特征与病理分析

目的探讨胰腺浆液性囊腺瘤(PSC)的影像特征及病理基础,分析误诊原因,总结防范措施。方法回顾性分析2017—2023年经手术病理证实为PSC且术前多层螺旋CT误诊为其他病变22例的临床资料及CT影像特征,并与病理HE染色对照分析。结果本组22例中因腹痛就诊7例,恶心呕吐就诊1例,其余14例均为体检发现,其中微囊型10例,大囊型8例,混合型3例,实质型1例;8例位于胰腺头颈部,14例位于体尾部;分叶状13例,中央瘢痕2例,钙化5例,上游胰管扩张5例;增强后明显强化3例,中度强化5例,轻度强化6例,无强化8例。13例PSC呈分叶状轮廓、边界清晰、呈蜂窝或多囊状结构、与胰管不相通,2例PSC可见内部纤维瘢痕,5例可见钙化等特征性影像表现。误诊为黏液性囊腺瘤和神经内分泌瘤各5例,实性假乳头状瘤4例,未定性3例,假性囊肿2例,潴留囊肿、胰腺导管内乳头状瘤、胰腺癌各1例。误诊时间7~180 d。均手术治疗并经术后病理学检查确诊。随访均无复发。结论不同类型PSC影像表现存在一定差异,但同时存在一些共同影像特征,对于非典型病例,CT诊断困难,误诊率高,需提高对于本病的认知,同时密切结合临床病史,可提高其诊断准确率。

胰腺实性假乳头状肿瘤的临床特征

目的:胰腺实性假乳头状肿瘤是一种罕见的低度恶性肿瘤,无典型的症状和体征,术前诊断较困难。本研究总结胰腺实性假乳头状肿瘤的临床特点,探讨其诊断方式及治疗原则。方法:选取2010年1月至2023年5月在山西医科大学第一医院行手术治疗并经病理学证实为胰腺实性假乳头状肿瘤的42例患者。回顾性分析其人口学、影像学、病理学特征及治疗方式。结果:42例患者中男12例,女30例,主要临床表现为消化道症状。术前诊断为胰腺实性假乳头状肿瘤22例,胰腺癌1例,黏液性囊腺瘤3例,肉瘤1例,无功能胰岛细胞瘤1例,神经内分泌瘤2例,余诊断不明确。术前的影像学检查中CT及磁共振成像(magnetic resonance imaging,MRI)的诊断正确率显著高于二维超声检查。肿瘤标志物中以神经元特异性烯醇化酶(neuron specific enolase,NSE)升高最常见(8例),可能对胰腺实性假乳头状肿瘤有诊断价值。免疫组织化学检测示:β连环素、波形蛋白(Vimentin)、α1-抗胰蛋白酶(α1-antitrypsin,AAT)、分化簇10(cluster of differentiation 10,CD10)、突触素(synaptophysin,SYN)、NSE的阳性率分别为100%、93%、86%、82%、78%、66%。42例患者均随访,其中6例失访,余36例随访49.83(25.00~104.53)个月(包括1例术后4年肿瘤复发转移,2个月后死亡;1例术后2年复发,目前正接受化学治疗;余34例未见肿瘤复发及转移,均存活)。结论:胰腺实性假乳头状肿瘤好发于女性,主要以消化系统症状为主,CT及MRI诊断正确率高,明确诊断需结合镜下观察和免疫组织化学检测,手术是有效的治疗方法。

胰腺实性假乳头状瘤影像特征分析

目的分析胰腺实性假乳头状瘤(solid pseudopapillary neoplasm of the pancreas,SPN)的影像学表现,提高SPN的诊断准确率。方法回顾性分析本院2019年-2022年经病理证实的19例SPN影像资料,4例行MR平扫+增强检查;15名患者行CT平扫+增强检查。结果19例患者平均年龄33.1±13.4岁,肿瘤中最大直径约为11.1cm,最小直径约为3cm,平均大小为5.4±2.4cm;16例(84.2%)肿瘤位于胰腺体尾部。11例肿瘤见强化包膜,10例(52.6%)肿瘤内可见浮云征。T1WI呈不均匀高或稍高信号,T2WI不均匀稍高信号,DWI呈不均匀稍高信号,增强扫描呈不均匀强化。9例肿瘤见钙化,2例为蛋壳样钙化。结论胰腺实性假乳头状瘤的表现具有特征性;小于40岁的女性患者中,肿瘤出现钙化或浮云征诊断SPN准确率为72.7%。

保留器官功能的胰腺切除术在胰腺实性假乳头状瘤外科治疗中的应用

胰腺实性假乳头状瘤(SPN)为多发于年轻女性的低度恶性肿瘤,手术切除后预后良好,但经典的胰腺切除术多伴随胰腺功能和胰周器官的损伤,长期并发症风险较高,患者远期生活质量受到影响。保留器官功能的胰腺切除术能最大程度地保留胰腺实质和周围脏器。本文就保留器官功能的胰腺切除术式的优劣势及研究、应用现状做一综述。

儿童胰腺实性假乳头状瘤的MRI表现

目的分析儿童胰腺实性假乳头状瘤(SPN)的MRI资料并探讨其MRI特征。方法回顾性分析11例经手术病理证实为儿童胰腺SPN的MRI平扫及增强影像资料,其中男3例,女8例,平均年龄(10.6±2.74)岁。观察肿瘤平扫和增强MRI的信号特征及强化方式;在扩散加权成像(DWI)上观察肿瘤是否扩散受限,并测量病变的ADC值;通过MR胆胰管成像(MRCP)观察肝胆管、胰管是否受压梗阻。结果11例均为单发病灶,5例位于胰头部,2例位于胰腺头颈交界处,4例位于胰尾部。MRI平扫,病灶呈T1WI等低信号,T2WI高信号;增强T1WI上无强化或轻度强化。病灶内可见出血,T1WI上呈斑片状高信号,增强扫描后无强化。DWI上,病灶呈不均匀高信号,平均ADC值为(1.16±0.34)×10^(-3)mm^(2)/s。4例合并胰腺炎,MRCP显示胰管扩张,肝门部肝管或胆管扩张。结论儿童胰腺SPN在MRI上具有边界清晰、DWI扩散受限、增强后无强化或轻度强化的影像特征,结合临床资料可明确诊断。

几种似胰腺囊腺瘤病变的CT误诊分析

目的 分析 8例CT误诊为胰腺囊腺瘤的原因。方法 8例作了CT平扫和增强扫描。结果 经病理证实为胰腺结核、肾上腺嗜铬细胞瘤、非功能性胰岛细胞瘤、胰腺囊实性肿瘤各 1例 ,胰腺癌和胰腺假囊肿各 2例 ,其中3例呈单发囊性病变 ,5例为囊实性病变 ,肿瘤实性部分及囊壁和分隔强化 ,仅 1例囊壁和分隔钙化。结论 多数病例可根据CT表现再结合临床及其它影像检查 。

胰腺实性—假乳头状肿瘤8例临床病理学分析

目的探讨胰腺实性-假乳头状肿瘤(solid-pseudopapillary tumor of pancreas,SPTP)的临床病理学特点、诊断和鉴别诊断、治疗及其预后。方法对8例SPTP患者的临床、病理学特点及免疫组化结果进行研究,并复习相关文献。结果 8例均为女性,年龄19～38岁,平均28岁。肿块直径3～15 cm。镜下肿瘤由乳头区和囊实区混合组成,瘤细胞围绕纤维血管轴心形成特征性假乳头结构。免疫表型:CK(3/8)、vimentin(8/8)、NSE(8/8)、CD56(8/8)、ER(0/8)、PR(5/8)、α-AT(8/8)、CgA(1/8)、Syn(8/8)、E-cadherin(0/8)、β-连环蛋白(8/8)和cyclinD1的核阳性率均大于40%。随访6例患者17～131个月,均无肿瘤复发及转移,并存活至今。结论 SPTP是一种好发于年轻女性,具有低度恶性潜能的少见胰腺肿瘤,其病理形态特征和免疫组化标记对SPTP的诊断和鉴别诊断具有重要价值。

胰腺实性假乳头状瘤293例临床荟萃分析

背景：胰腺实性假乳头状瘤（SPNP）是一种低度恶性的胰腺肿瘤，近年报道的例数明显增多。目的：总结SPNP的临床特征。方法：对以“囊实性肿瘤／胰腺”、“实性假乳头状瘤／胰腺”为关键词，在中国医院知识仓库医学专题全文数据库（CHKD）检索得到的1997年10月～2008年8月发表的32篇文献中293例SPNP患者的临床特征进行分析。结果：人组SPNP患者的男女比例为1：8．2，平均年龄27．3岁，临床表现无特异性。SPNP影像学表现为由不同比例的囊实性成分组成，术前影像学检查的诊断率为41．0％。所有患者均为单发性肿块，平均最大径7．6cm。218例患者的包膜完整，75例不完整。共196例患者接受治疗，根治性手术切除率94．9％。220例患者平均随访33_3个月，6例复发．3例死亡。结论：SPNP是一种并非罕见的低度恶性肿瘤，好发于年轻女性。手术切除对SPNP的疗效较好．患者预后佳。

胰腺多发性实性-假乳头状肿瘤2例并文献复习

目的报道2例临床上极罕见的胰腺多发性实性-假乳头状肿瘤(solid-pseudopapillary neoplasm,SPN),并复习文献探讨多发性SPN的临床及病理学特点。方法分析2例多发性SPN的临床表现,组织病理学以及免疫组化特点,回顾文献中报道的2例多发性SPN,并与单发性SPN进行对比。结果 4例多发性患者中女性3例、男性1例,症状体征无特异性,肿块大小不一,边界清,易囊变,肿块之间彼此完全分隔开。镜下示形态一致的肿瘤细胞围绕纤细的小血管形成特征性的假乳头状结构。肿瘤细胞表达波形蛋白、神经元特异性烯醇化酶(neuron-specific enolase,NSE)、突触素、孕酮受体、CD10及β-连环蛋白的异常核表达。患者肿瘤完全手术切除后,均长期生存。结论胰腺多发性SPN较罕见,其临床及病理学特点与单发性SPN类似。

胰腺实性-假乳头状肿瘤βcatenin及相关基因表达

目的研究βcatenin及相关基因在胰腺实性-假乳头状肿瘤(solidpseudopapillaryneoplasmofpancreas,SPN)中的表达,探讨它们在SPN发生中的作用。方法回顾性复习7例SPN的临床和病理资料,并检测βcatenin、cyclinD1、p53等基因的蛋白表达。结果7例SPN都有βcatenin的异常染色(>50%的肿瘤细胞有细胞质和细胞核着色)、上皮钙黏蛋白细胞膜表达降低和p53低表达(<10%),p53表达在1例伴肝转移的SPC表达最高(>5%)。3例SPNcyclinD1过度表达(>10%),4例低表达(<5%);5例SPNMIB1+细胞<1/HPF,2例SPNER或PR+。结论βcatenin及相关基因的表达异常在SPN发生中起重要作用。

胰腺实性假乳头状肿瘤10年病例的临床分析

目的总结分析胰腺实性假乳头状肿瘤(SPN)的诊断及治疗方法,以期为临床早期诊断提供参考。方法收集自2004年2月至2014年9月收治于西安交通大学第一附属医院的62例经病理检查证实的SPN患者的临床资料,对SPN的临床特征、诊断、治疗方法进行回顾性分析与总结。结果62例患者中女性55例(88.71%),男性7例(11.29%),平均年龄(31.58±12.67)岁,临床表现无特异性,多为体检时发现,肿瘤好发于胰体尾部,平均最大径(7.81±3.54)cm,术前血常规、肝肾功均未见明显异常,影像学提示胰腺占位,均行手术治疗。术后恢复良好,无死亡病例,均无并发症发生,术后病理诊断均为胰腺实性假乳头状肿瘤,均未见淋巴结转移。至末次随访时62例患者均存活,2例(3.2%)复发。结论 SPN是好发于中青年女性的低度恶性肿瘤,临床表现缺乏特异性,影像学具有重要诊断价值,手术治疗效果好。

胰腺实性假乳头状瘤的临床病理分析

背景:胰腺实性假乳头状瘤(SPNP)是一种并非罕见的低度恶性胰腺肿瘤,近年报道的例数明显增多。目的:总结SPNP的临床病理特点,探讨其生物学行为。方法:回顾性分析2003年1月～2007年6月上海瑞金医院收治的13例SPNP患者的临床病理资料,并采用免疫组化方法检测肿瘤细胞α1-抗胰蛋白酶(AT)、α1-抗胰凝乳蛋白酶(ACT)、神经元特异性烯醇化酶(NSE)、波形蛋白、CD56、CD10、胰岛素、胰高血糖素、胃泌素、生长抑素等的表达。结果:526例胰腺肿瘤患者中,13例(2.5%)诊断为SPNP,男女比例为1∶5.5,平均年龄31.5岁,瘤体平均直径8.0cm。术前影像学诊断SPNP者6例(46.2%)。组织形态学显示瘤细胞大小一致,排列成实性片状区和假乳头结构。影像学显示4例浸润血管和周围组织,其中1例发生肝转移。免疫组化示α1-AT、α1-ACT、波形蛋白均呈阳性,11例NSE阳性,无胰岛素和胃泌素阳性者。所有患者均行手术完整切除肿瘤,术后平均随访24个月,均无复发或转移。结论:SPNP好发于年轻女性,具有低度恶性潜能,免疫组化检测对其诊断和鉴别诊断具有较重要的价值,手术治疗对SPNP的疗效较好。