子宫血管周上皮样细胞肿瘤临床病理学观察

子宫血管周上皮样细胞肿瘤(perivascular epithelioid cell tumor,PEComa)是一种非常罕见的肿瘤,极易误诊.作者在病理诊断中诊断1例,结合文献复习报道如下.     

子宫血管周上皮样细胞肿瘤3例临床病理分析

目的探讨子宫血管周上皮样细胞肿瘤(perivascular epithelioid cell tumor, PEComa)的临床病理特征、诊断及鉴别诊断等。方法采用免疫组化EnVision两步法对3例子宫PEComa进行检测,并复习相关文献。结果 3例肿瘤由梭形细胞和上皮样细胞构成,胞质透明至嗜酸性,间质血管丰富,其中1例肿瘤细胞异型性显著,并见出血、坏死。免疫表型:3例HMB-45阳性,2例SMA、Caldesmon阳性,Melan-A、TFE-3、desmin、CD10、CD117和S-100蛋白均阴性,Ki-67增殖指数5%～30%。随访4～55个月,患者均存活。结论子宫PEComa是一种少见的间叶源性肿瘤,结合组织学形态及免疫表型可辅助诊断。     

子宫上皮样滋养细胞肿瘤的临床病理特征

目的探讨子宫上皮样滋养细胞肿瘤(ETT)的临床病理特征。方法分析1例合并局灶绒毛膜细胞癌的临床和病理资料，结合文献进行讨论。观察病变的大体及镜下特点，采用HE染色及免疫组化S-P法测定cK(AEl／AE3)、HPL、HCG、α-inhibin。结果肿瘤由绒毛膜型中间滋养细胞组成，瘤细胞巢呈地图样分布，瘤巢间充满嗜酸性透明变性物质。肿瘤的免疫表型：CK(AE1／AE3)、HPL、PLAP和α-inhibin均呈阳性表达。结论ETT为滋养细胞肿瘤的新类型，系由绒毛膜型中间滋养细胞组成，属于低度恶性肿瘤。ETT应与胎盘部位滋养细胞肿瘤、胎盘部位结节、绒毛膜细胞癌和宫颈鳞癌鉴别。     

子宫血管周上皮样细胞肿瘤1例

患者,68岁,以"阴道不规则出血3 个月"为主诉,月经规律4～5 天/30天,56 岁绝经.3 个月前阴道出血,量少;3天前阴道出血增多,因症状持续存在而就诊.彩超示:子宫后位,长径38 mm,前后径28 mm,横径35 mm,内膜厚3 mm,轮廓清晰,形态正常,肌层回声不均.子宫宫底部可见大小21 mm ×15 mm...     

子宫血管周上皮样细胞肿瘤

例1女,33岁。2002年2月开始感觉腰酸、腹胀、经量增多来我院就诊。妇科检查示子宫前位,增大如孕2个月左右。B超检查子宫前壁峡部一7·7cm×6·5cm×5·5cm大小低回声团块,向浆膜面突出,内部光点分布不均匀,以后每年定期2次子宫附件B超检查,均示子宫峡部肿块逐渐增大,考虑子宫平滑肌瘤。2004年9月B超检查示子宫前壁峡部一8·5cm×4·3cm×6·4cm低回声团块,周边见血流信号,其内见2·0cm×1·9cm不规则液性暗区,子宫内膜及两侧附件无特殊。诊断为子宫肌瘤部分液化行子宫全切术。CA199、CA125、癌胚抗原(CEA)等各项实验室检查均无异常。术…     

子宫外上皮样滋养细胞肿瘤

患者女，28岁。1998年行产钳分娩一男婴，同年早孕人流一次。2001年12月4日，因停经48天，阴道流血10d，近4天出现下腹隐痛伴肛门附胀及里急后重来院就诊，拟诊“宫外孕”收治入院。     

鼻腔血管周上皮样细胞肿瘤临床病理分析

目的 探讨血管周上皮样细胞分化肿瘤(neoplasm with perivascular epithelioid cell differentiation,PEComa)的临床病理特征,并对国内外相关文献进行复习,以提高对PEComa的认识和病理诊断水平.方法 对1例PEComa进行临床表现分析,对其病理组织学和免疫组化染色进行观察,并结合国内外相关文献复习PEComa的特点.结果 患者发现左鼻腔无痛渐大性肿物伴反复出血1年余.组织病理学形态表现为裂隙状血管周围见片巢状排列的上皮样细胞,细胞胞质透亮,内含淡红色细颗粒状,核小且一致,圆形或卵圆形,核仁小,核分裂罕见.免疫表型:HMB-45、Melan-A、vimentin和SMA(+);S-100蛋白、CK和EMA(-).结论 发生于鼻腔的PEComa罕见,诊断主要依靠病理学,手术切除为首选治疗,其为低度恶性潜能肿瘤,需长期随访.     

子宫上皮样滋养细胞肿瘤的临床病理特征

目的探讨子宫上皮样滋养细胞肿瘤(epithelioid trophoblastic tumor,ETT)的临床病理特征。方法收集7例子宫ETT的临床病理资料,进行病理学分析,并复习相关文献。结果 7例ETT发病年龄31～45岁(平均37.6岁),距前次妊娠6～216个月(平均94个月),临床表现闭经和阴道不规则流血。大体上肿瘤呈膨胀性生长,直径0.5～10cm,镜下显示典型的上皮样瘤细胞巢、"地图样"坏死、"血管瘤细胞套样"结构,4例合并子宫平滑肌瘤。免疫组化:CK18、CD10、p63均呈阳性,hPL、PLAP、CD146、hCG、inhibin部分病例灶状阳性,Ki-67增殖指数5%,p53阳性率4例5%。结论 ETT是罕见的具有恶性潜能的绒毛膜中间型滋养细胞肿瘤,需与子宫上皮样平滑肌肉瘤、宫颈鳞癌及其它滋养细胞疾病等鉴别,诊断和鉴别诊断主要依据临床病史、病理学形态及免疫组化。     

腹膜后恶性血管周上皮样细胞肿瘤的临床病理分析

目的:探讨腹膜后血管周上皮样细胞肿瘤(perivascular epithelioid cell neoplasms,PEComas)的临床和病理学特点,提高对PEComas的认识和诊断水平。方法:对1例腹膜后恶性PEComas进行临床病理分析及免疫组织化学研究,并复习相关文献。结果:肿瘤组织主要由上皮样细胞构成,胞质丰富、透明或嗜酸性颗粒状,间质富于血管。免疫组织化学显示:肿瘤细胞平滑肌肌动蛋白、HMB45,melan A及Desmin阳性,上皮膜抗原和vimentin局灶阳性,CgA,Syn,S-100,CD117,CD34,细胞角蛋白,calretinin及inhibin均阴性。结论:腹膜后PEComas是一种非常罕见的肿瘤,具有独特的组织学和免疫组织化学特征,应与腹膜后其他上皮样细胞肿瘤进行鉴别。     

子宫血管周上皮样细胞肿瘤2例报道及文献复习

子宫血管周上皮样细胞肿瘤（perivascular epithelioid cell tumor,PEComa）是一种少见的肿瘤,有其特有的镜下特点和免疫组化特征。现收集2例子宫PEComa病例,并结合文献探讨其诊断和鉴别诊断,以提高对该病的认识。     

Perivascular epithelioid cell tumor of the pancreas: case report and literature review

Neoplasms with perivascular epithelioid cell differentiation (PEComas) of the pancreas are rare, and only 22 cases have been reported globally. Therefore, clinician and pathologist knowledge of this tumor’s biologic behavior and molecular genetics has been limited. A 40-year-old female patient presented with a space-occupying mass in the pancreas found by abdominal B-mode ultrasonography upon physical examination. Laparoscopic resection of the pancreatic body and tail was performed, and a cystic-solid tumor of about 2 × 2 cm was identified. PEComa is a type of mesenchymal tumor with uncertain biologic behavior, more frequently found in females. PEComa features a unique histomorphology and immunophenotype. We summarize the characteristics and research progress of the pancreatic PEComa, which will be convenient for physicians and pathologists to fully understand the disease to avoid misdiagnosis and to provide a reference for treatment and prognosis.     

Perivascular epithelioid cell tumor of the uterus: a case report

A case of a perivascular epithelioid cell tumor (PEComa) arising in the uterus of a 35-year-old woman is presented. Imaging studies revealed a 5 cm well circumscribed mass in the uterine fundus. The tumor was composed of clear to faintly eosinophilic, epithelioid and spindled cells. Immunohistochemically, most tumour cells were strongly positive for HMB-45, smooth muscle actin and desmine, but negative for epithelial markers, S-100 Protein and neuroendocrine markers. Reevaluation of the patient for signs of tuberous sclerosis complex after the diagnosis gave negative results. At the most recent follow-up 4 months later there was no evidence of recurrence.     

非特殊性血管周上皮样细胞肿瘤31例的病理学观察

目的 探讨非特殊性血管周上皮样细胞肿瘤(PEComa-NOS)的临床病理学特征,评价恶性血管周上皮样细胞肿瘤(PEComa)的诊断标准.方法 回顾性复习31例PEComa-NOS的临床表现、影像学资料、光镜形态和免疫学表型,分析预后资料.2例为空芯针穿刺活检标本,2例为剖腹探查活检标本,其余27例为手术切除标本.结果 ...     

Perivascular epithelioid cell tumor of the uterus: immunohistochemical, ultrastructural and molecular study

A case of perivascular epithelioid cell tumor of the uterus is reported, occurring in a 32-year-old woman. The tumor (8.0 cm in dimension) showed exophytic growth from the outer half of the myometrium. Histopathologically, the tumor was composed of thick blood vessels and perivascular epithelioid cells. The neoplastic cells were strongly immunoreactive for HMB45 antigen, CD117 (c-kit), vimentin and the progesterone receptor, but completely negative for S-100 protein, smooth muscle actin, desmin, CD34, the estrogen receptor and p16. The Ki-67 labeling index was low (1.25%). Ultrastructurally, the neoplastic cells had numerous premelanosomes with some glycogen deposits. Single-stranded DNA conformational polymorphism of p53 and methylation-specific polymerase chain reaction of p16 revealed negative results. Definite melanosomes on electron microscopic analysis and coexpression of HMB45 antigen and stem cell factor receptor (CD117) may provide the clue to understanding perivascular epithelioid cell tumor because angiomyolipoma also coexpresses HMB45 antigen and CD117.     

Coexisting epithelioid trophoblastic tumor and placental site trophoblastic tumor of the uterus following a term pregnancy: report of a case and review of literature

Gestational trophoblastic neoplasms are a group of fetal trophoblastic tumors including choriocarcinomas, epithelioid trophoblastic tumors (ETTs), and placental site trophoblastic tumors (PSTTs). Mixed gestational trophoblastic neoplasms are extremely rare. The existence of mixed gestational trophoblastic neoplasms that were composed of choriocarcinoma and/or PSTT and/or ETT was also reported. Herein, we present a case of uterine mixed gestational trophoblastic neoplasm which is ETT admixed with PSTT, and reviewed 9 cases of mixed gestational trophoblastic neoplasms reported in English literature available. The most common combination was a choriocarcinoma admixed with an ETT and/or PSTT. Mixed gestational trophoblastic neoplasms present in women of reproductive age and rare in postmenopausal, Abnormal vaginal bleeding is the most common presenting symptom, serum β-HCG levels are elevated, mostly below 2500 mIU/ml, the tumor was limited to uterus in 7 cases, the rest of 3 with pulmonary metastases at the time of diagnosis. Mixed gestational trophoblastic neoplasms have more similar clinical features with intermediate trophoblastic tumors (ITTs). Total hysterectomy with lymph node dissection is recommended treatment for mixed gestational trophoblastic neoplasms, and chemotherapy should be used in patients with metastatic disease and with nonmetastatic disease who have adverse prognostic factors.     

促纤维组织增生性小圆细胞肿瘤2例报道及文献复习

目的 探讨促纤维组织增生性小圆细胞肿瘤的临床病理特点,提高诊断水平.方法 对2例本病少见部位发生者临床病理资料进行分析,并行组织病理学(HE)和免疫组化(SP法)观察.结果 该肿瘤多呈单结节或多结节状浸润性生长,瘤细胞小圆形、核深染、胞质少,呈团、巢状排列,间质有大量增生的纤维结缔组织.免疫表型同时表达上皮性、间叶性和神经源性标记物.结论 促纤维组织增生性小圆细胞肿瘤罕见,临床表现复杂,可发生在腹腔也可在其他部位.肿瘤具有特征性的组织学和免疫组化表现.预后大多较差.     

Perivascular epithelioid cell tumor (PEComa) of the liver: a case report and review of the literature

Perivascular epithelioid cell tumor (PEComa) is rare entity and has been described only recently. By immunohistochemistry and genetics it belongs to the family of tumours which comprises angiomyolipoma, clear cell "sugar" tumor of lung, lymphangioleiomyomatosis and clear cell myomelanotic tumor of ligamentum falciforme/teres hepatis. We describe an unusual case of hepatic PEComa arising in a 55-year-old woman with previous history of glioblastoma. Histologically the tumor grew in expansive way, and was composed of clear and eosinophilic epithelioid cels, without vascular or lipomatous component characteristic of angiomyolipoma. There was mild nuclear pleomorphism, sporadic mitotic activity and haemorrhage without necrosis. On immunohistochemistry, the tumor was HMB-45+50, Melan-A and smooth muscle actin positive. Tyrosinase, S-100 protein, cytokeratin coctail, EMA, vimentin, muscle specific actin, CD10, TTF-1, hepatocyte, desmin and cyclin D1 were negative. Sporadic nuclear p53 positivity was seen. The main differential diagnosis of hepatic PEComa includes clear cell variant of liver cell adenoma and hepatocellular carcinoma, metastases of various clear cell carcinomas and metastasis of malignant melanoma. In respect of uncertain biologic potential of PEComa, long term follow up is indicated.     

肝脏血管周上皮样细胞肿瘤一例

患者男,44岁.4个月前体检时腹部B超发现肝右叶低回声占位,大小约2.5 cm×2.0 cm.无肝区疼痛、腹胀、腹泻,无恶心、呕吐,无返酸、嗳气,无皮肤黄染及瘙痒,无大小便染色加深及大便颜色变浅.