儿童腺泡状软组织肉瘤13例临床病理学特征

目的探讨儿童腺泡状软组织肉瘤(alveolar soft part sarcoma, ASPS)的临床病理、分子遗传学特点、诊断及鉴别诊断。方法对北京儿童医院2009年8月至2018年11月13例儿童ASPS病例存档切片行HE染色及组织化学染色[包括过碘酸-雪夫(PAS)染色及淀粉酶消化PAS(D-PAS染色)]。采用免疫组织化学染色检测TFE3、INI1、CD68等的表达, 应用荧光原位杂交(FISH)法检测TFE3基因断裂易位情况。结果 13例ASPS中, 男童4例, 女童9例, 年龄1岁2个月至13岁8个月, 平均7.8岁, 5岁以下4例。组织学上, 11例肿瘤细胞呈腺泡状、巢状排列, 2例肿瘤细胞呈实性、弥漫性生长。瘤细胞胞质嗜酸性, 可见明显的空泡现象, 核多形性, 核仁突出, 核分裂象罕见, 3例可见血管浸润。免疫组织化学染色TFE3弥漫核阳性, INI1、CD68、波形蛋白阳性, MyoD1、Myogenin、细胞角蛋白、S-100蛋白等均阴性。7例PAS及D-PAS染色显示肿瘤细胞质内均可见紫红色针状或棒状结晶体。9例行FISH检测, 均显示TFE3基因断裂易位。结论 ...     

腺泡状软组织肉瘤16例临床病理分析

目的探讨腺泡状软组织肉瘤(alveolar soft part sarcoma,ASPS)的临床病理、免疫表型以及分子遗传学特征。方法对16例ASPS进行临床病理学、细胞化学和免疫表型观察,其中2例行FISH检测。结果 16例ASPS中男性6例,女性10例,发病年龄8~58岁(中位年龄31.7岁),临床表现为局部缓慢生长的肿块。肿瘤发生部位包括四肢、肩背部、舌、声带、肺、子宫颈、输尿管。镜下见典型的器官样或腺泡状结构,形成窦隙状血管及纤维间隔,肿瘤胞质内含丰富嗜酸性颗粒。PAS染色显示肿瘤细胞内可有结晶体形成,免疫组化标记肿瘤细胞TFE3阳性,FISH检测肿瘤细胞存在ASPL-TFE3基因融合。结论 ASPS好发于青少年,肿瘤好发部位为四肢,少见部位(舌、声带、子宫颈、输尿管等)发生的ASPS易被误诊为上皮性恶性肿瘤。病理诊断时需与原发或转移性腺癌、副神经节瘤鉴别。肿瘤细胞形成典型的腺泡状结构并且免疫组化标记TFE3和组织蛋白酶K对诊断有意义,诊断时需结合ASPL-TFE3基因融合检测技术。     

腺泡状软组织肉瘤48例临床病理分析北大核心CSCD

目的探讨腺泡状软组织肉瘤（ASPS）的临床病理特点及鉴别诊断。方法总结48例腺泡状软组织肉瘤的临床病理学特征、免疫表型及基因检测结果,并复习相关文献。结果收集2001–2014年48例腺泡状软组织肉瘤,男性17例,女性31例,男女之比为1.0∶1.8,发病年龄2～60岁,中位年龄26岁。肿瘤多数位于深部软组织内,下肢多见。组织学可见特征性的腺泡状或巢状结构,其周围由薄壁窦隙样血管环绕。瘤细胞体积大,胞质丰富,嗜伊红颗粒状或半透明空泡状,核圆形、卵圆形或不规则形,可见明显的核仁。血管内常见瘤栓。部分病例伴出血、坏死、囊性变。所检测的33例ASPS免疫组织化学TFE3均为阳性（100%,33/33）,4例行荧光原位杂交检测均示肿瘤细胞有TFE3–ASPL基因融合。结论腺泡状软组织肉瘤较为少见,发病年龄轻,TFE3具有较高的特异性和敏感性,但在其他肿瘤也可有阳性表达,需结合其他标志物综合鉴别。     

儿童和成人腺泡状软组织肉瘤的临床病理学特征

目的探讨儿童和成人腺泡状软组织肉瘤(alveolar soft part sarcoma, ASPS)的临床病理学特征、诊断及鉴别诊断。方法采用免疫组化EliVision两步法检测9例ASPS中TFE3、CK、EMA、desmin、SMA、Myogenin、MyoD1、S-100、HMB-45、CgA、Syn、CD68的表达,并对其中7例患者行FISH检测。结果 3例儿童患者分别发生于头颈、眼眶、舌部;6例成人患者均位于四肢及躯干部位。镜下肿瘤细胞胞质丰富,嗜酸性或淡染,部分伴颗粒状结晶,局部呈坏死,可见较多的核分裂象。儿童ASPS多由薄壁血管分割成实性片状小巢;成人常见肿瘤被纤维组织包绕,周围伴厚壁血管,或由窦状血管分隔成腺泡状、"器官样"结构。免疫表型:儿童组患者TFE3蛋白均阳性(3/3),成人组1例标本为阴性(1/6),其余均阳性(5/6)。FISH检测:3例儿童及4例成人患者均为TFE3断裂基因阳性(7/7)。随访39～92个月,儿童ASPS患者预后较好,3例均存活;成人ASPS患者预后较差,2例伴多脏器转移者死亡。结论 ASPS好发于成人和儿童,均有位于Xp11.2染色体的TFE3基因易位及融合,但形态学特征并不完全相同,其好发部位和预后也有差异。     

TFE3重排的上皮样血管内皮瘤7例临床病理特征

目的 探讨TFE3重排的上皮样血管内皮瘤(epithelioid hemangioendothelioma, EHE)的临床病理学特征、免疫表型及分子特点。方法 收集7例原发性TFE3重排的EHE,采用EnVision两步法进行免疫组化染色，FISH检测WWTR1-CAMTA1融合基因及TFE3基因断裂重排情况，二代测序检测其融合转录本。结果 7例患者中男性3例，女性4例，年龄33～61岁(中位年龄45岁，平均46.3岁)。肿瘤发生于软组织5例、肺1例、淋巴结1例。组织学上，肿瘤细胞轻至中度异型性，呈上皮样，胞质丰富嗜酸性，见胞质内空泡和胞质内红细胞，细胞核卵圆形，染色质分布均匀，有小核仁，可见双核或多核细胞，未见核分裂及坏死；肿瘤细胞呈条索状、实性片状和巢状排列，可见假腺泡/假肺泡结构。免疫表型：肿瘤细胞表达CD31(7/7)、CD34(4/7)、ERG(7/7)、TFE3(7/7),Ki-67增殖指数<5%,不表达CK(AE1/AE3)、EMA。7例FISH检测均可见TFE3基因断裂，其中1例行二代测序，检测到YAP1(exon1)-TFE3(exon4)融合，7例均未见WW...     

4例腺泡状软组织肉瘤临床病理分析及文献复习

目的：探讨腺泡状软组织肉瘤（alveolar soft-part sarcoma,ASPS）的临床病理学特征及其鉴别诊断。方法：对4例ASPS的临床资料进行回顾性分析,对标本进行组织病理学观察及免疫组织化学（免疫组化）研究。结果：患者3例为男性,年龄分别为30,25,27岁;1例为女性,34岁。发病部位4例均位于下肢深部软组织内。镜下肿瘤细胞排列成腺泡状或实性,细胞巢间可见窦状血管分隔,肿瘤细胞胞质丰富嗜酸,胞质内可见棒状结晶体。免疫组化：4例均TFE3阳性,3例MyoD1胞质阳性。1例患者随访15年后复发伴肺转移死亡,3例患者随访6个月无瘤存活。结论：ASPS是一种罕见的恶性肿瘤,青少年多见,结合临床、病理学特征及免疫组化,可做出正确诊断。鉴别诊断需除外腺泡状横纹肌肉瘤等血窦丰富的肿瘤,TFE3是该肿瘤的特异性标志物。     

21例腺泡状软组织肉瘤的临床病理分析

目的探讨腺泡状软组织肉瘤的临床病理学特征及其鉴别诊断。方法对21例ASPS的临床资料进行回顾性分析,对标本进行组织病理学观察及免疫组织化学研究。结果21例腺泡状软组织肉瘤,男性11例,女性10例,发病年龄4～56岁,平均25.9岁,发病部位主要位于下肢深部软组织内,镜下肿瘤细胞排列成腺泡状或实性,细胞巢之间可见窦状血管分隔,瘤细胞胞质内含丰富的嗜酸性颗粒。PAS染色,瘤细胞胞质内可见棒状结晶体,免疫组化:MyoD110例阳性,desmin4例阳性,S-1009例阳性,NSE11例阳性,Vim11例阳性,AE1/AE3、CK、EMA、SMA、MSA、Syn全部为阴性。结论ASPS是多见于青少年和青年的罕见肿瘤,但多数早期出现血液转移,切除后易复发,最终预后欠佳,结合临床病理学特征及免疫组化,可作出正确诊断。     

Xp11.2易位/TFE3基因融合相关性肾癌的病理特征与临床分析

目的探讨Xp11．2易位／TFE3基因融合相关性肾癌的临床病理特征、免疫表型、鉴别诊断及预后。方法对11例Xp11．2易位／TFE3基因融合相关性肾癌进行光镜观察和免疫组织化学研究及随访10～112个月,并复习相关文献。结果11例肿瘤中女性7例,男性4例。年龄8～26岁,平均16、3岁。肿块直径2．5～6．0cm。光镜下癌组织呈两种结构,一种为腺管状、乳头状、巢状分布。细胞界限清楚,有大量透明或嗜酸性胞质。泡状染色质、核仁明显,沙砾体多见。另一种结构更加紧密,多见实性巢状结构,癌细胞缺乏大量的胞质,核仁不明显,沙砾体少见。免疫表型：本组11例均TFE3、CD10、a-甲酰基-CoA消旋酶（P504s）弥漫表达,细胞广谱角蛋白（CK—pan）、上皮细胞膜抗原（EMA）、波形蛋白仅部分病例表达,所有病例CK7、肾脏特异性钙黏蛋白（Ksp—cadherin）、CD117阴性表达。结论Xp11．2易位／TFE3基因融合相关性肾癌是一种少见肿瘤,诊断主要依据患者的年龄。病理学形态和免疫组织化学TFE3阳性。     

Alveolar soft part sarcoma of the endometrium with expression of CD10 and hormone receptors

Alveolar soft part sarcoma (ASPS) is a rare tumor of uncertain histogenesis, mainly localized in the extremities. ASPS originating in the uterine corpus is quite rare; only eight such cases have been reported in the literature. We here present another case of ASPS found in the endometrium in a 50-year-old woman. Metastatic malignant tumor, including ASPS from other organs, was excluded by physical examination and imaging modalities. Thallium 201 was only localized in the uterus. The tumor showed characteristic histological features of ASPS: alveolar architecture with fibrovascular septa and abundant eosinophilic granular cytoplasm with periodic acid-Schiff-positive crystalline material. Diffuse nuclear immunoreactivity for TFE3, a marker recently reported to be specific for ASPS, further supported the diagnosis of ASPS. Interestingly, this tumor was negative for myogenic markers, but positive for CD10, progesterone receptor, and estrogen receptor. These immunohistochemical results and the tumor location suggest a possible link between endometrial stromal cells and the development of this tumor.     

Brain Metastasis of Crystal-Deficient,CD68-Positive Alveolar Soft Part Sarcoma: Ultrastructural Features and Differential Diagnosis

We report a case of alveolar soft part sarcoma (ASPS) presenting as an isolated frontal lobe metastasis. The tumor demonstrated little or no immunoreactivity for a broad panel of antibodies yet strong, diffuse immunoreactivity with CD68. On electron microscopy, the characteristic rectangular to rhomboid crystalline inclusions of ASPS were not present. Electron-dense granules resembling peroxisomes were present, sometimes in association with elongated granular structures having a periodic, lattice-like arrangement. Metastatic ASPS was confirmed by demonstration of an ASPSCR1–TFE3 fusion and imaging studies that excluded metastatic Xp11.2 translocation renal cell carcinoma. The primary site was subsequently identified in the lower extremity.     

Fine‐needle aspiration of alveolar soft part sarcoma: Histologic correlation and aberrant CD68 expression

Alveolar soft part sarcoma is a rare highly malignant neoplasm of the soft tissue and usually occurs in the lower extremities of children and young adults. We report two cases of alveolar soft part sarcoma: a 24‐year‐old Latino man with a 10‐ cm neck mass and a 56‐year‐old Latino woman with a recurring thigh mass. Fine‐needle aspiration and a core biopsy were performed on both, which was followed by tumor resection on the man. The smears displayed numerous loosely cohesive or single large cells with abundant granular cytoplasm, round nuclei, vesicular chromatin, and occasional prominent nucleoli. Periodic and Schiff (PAS)‐positive, diastase‐resistant rhomboid, or needle‐shaped crystals were present. Both tumors had diffuse and strong nuclear TFE3 expression and aberrant cytoplasmic CD68 expression. Fluorescence in situ hybridization analysis was performed in the first case, which detected a characteristic translocation t(X;17)(p11;q25). The diagnosis of alveolar soft part sarcoma was rendered in both cases. Herein, we present the cytology, histology, immunohistochemistry, and molecular findings and discuss the differential diagnosis.     

Primary alveolar soft part sarcoma (ASPS) of the breast: report of a deceptive case with xanthomatous features confirmed by TFE3 immunohistochemistry and electron microscopy

Alveolar soft part sarcoma (ASPS) is a rare neoplasm that most commonly presents in the lower extremities. Although ASPS has distinctive histologic features, it may cause diagnostic problems when it arises in unusual locations. To our knowledge, only 1 case of ASPS arising within the breast has previously been reported. Here, we report a second case of primary mammary ASPS. The patient was a 44-year-old woman who presented with a breast mass. Needle biopsy was performed, yielding a polygonal cell lesion with abundant, predominantly xanthomatous cytoplasm. The cells labeled strongly for the histiocytic marker CD68, suggesting a benign macrophage-rich lesion. However, the unusual nature of the lesion as well as the prominence of nucleoli prompted suggestion for an excision. The excision more clearly revealed the lesion's alveolar architecture and demonstrated cells with more eosinophilic cytoplasm, along with the xanthomatous cells. The diagnosis of ASPS was confirmed by electron microscopy, which revealed characteristic membrane-bound rhomboidal crystals, as well as by nuclear labeling for TFE3 protein by immunohistochemistry. With this report, we confirm the utility of a novel immunohistochmical technique for the identification of an ASPS presenting in an unusual locale.     

Alveolar soft part sarcoma presenting as a breast metastasis in a patient with a history of thyroid cancer: a case report

Metastases to the breast are uncommon, accounting for 0.5% of breast tumors, and most of them are originated from lymphoma, melanoma and carcinomas of various organs. Alveolar soft part sarcoma (ASPS) is a very rare neoplasm that is usually found in the lower extremities. Lungs are the common site of dissemination and may represent initial manifestation of disease. We report a clinically unsuspected case of ASPS presenting as a breast metastasis in a 25-year-old woman. The patient’s medical history was notable for a thyroid cancer treated by surgery and radioiodine ablation 2 years ago. Core needle biopsy of slowly growing breast mass yielded polygonal cells with abundant eosinophilic cytoplasm arranged into solid pattern. Differential diagnosis between apocrine cell carcinoma, paraganglioma, granular cell tumor, neuroendocrine carcinoma, ASPS and metastatic hepatocellular and renal cell carcinoma was rendered by immunohistochemistry. Strong nuclear TFE3 immunoreactivity confirmed a diagnosis of ASPS. Retrospectively a primary tumor was found in the thigh. Most likely, ASPS and thyroid cancer in the patient were growing synchronously and independently.