单囊型成釉细胞瘤24例临床病理分析

目的：分析单囊型成釉细胞瘤的临床病理特点。方法：对２４例单囊型成釉细胞瘤行ＨＥ染色及组织学观察。结果：２４例中，男性１３例，女性１１例；平均年龄２９．２岁；下颌２３例，上颌１例。Ｘ线片示呈单囊性边界清楚透光区。病理表现分三型：（１）腔内型（丛状单囊成釉细胞瘤）７例，（２）壁内型（壁成釉细胞瘤）１０例，（３）混合型７例，未见ＷＨＯ第一型牙源性囊肿早期成釉细胞瘤变。结论：单囊型成釉细胞瘤的临床和Ｘ线表     

补骨脂素与维甲酸联合应用对Mc3细胞膜表面四种凝集素受体表达的影响

目的 研究８－ＭＯＰ与ＡＴＲＡ联合应用对Ｍｃ３细胞膜表面凝集素受体表达的影响。方法 免疫组织化学染色方法。结果 对照组凝集素受体表达分别为：ＰＮＡ（＋￣＋＋）,ＳＢＡ（＋￣＋＋）,ＲＣＡ（＋￣＋＋）;８－ＭＯＰ组凝集素受体表达分另为：ＰＮＡ（－￣＋＋）,ＵＥＡ（＋）,ＲＣＡ（＋￣＋＋）;ＡＴＲＡ组表达分别为：ＰＮＡ（－￣＋＋）,ＵＥＡ（＋）,ＳＢＡ（－￣＋＋）,ＳＢＡ（＋￣＋＋）,ＲＣＡ（＋）,８     

5种口腔颌面部肿瘤细胞系凝集素受体的分布特点

以ＲＣＡ、ｃｏｎＡ、ＷＧＡ、ＳＢＡ、ＵＥＡ、ＤＢＡ、ＰＮＡ７种凝集素作探针，检测粘液表皮样癌ＭＥＣ－１细胞、舌癌Ｔｃａ８１１３细胞、腺样囊性癌ＡＣＣ细胞、口底癌ＨＳＣ２细胞、牙龈癌Ｃａ９－２２细胞等５种口腔颌面部肿瘤细胞系的凝集素受体的情况。发现各种肿瘤细胞的凝集素受体各具特点，凝集素以ｃｏｎＡ、ＲＣＡ、及ＷＧＡ的阳性率最高，分布的部位（胞浆或胞膜等）和形式（大小不同的颗粒、疏密不等的网络等）则各有不同。     

单囊型成釉细胞瘤24例临床病理分析

目的:分析单囊型成釉细胞瘤的临床病理特点.方法:对24例单囊型成釉细胞瘤行HE染色及组织学观察.结果:24例中,男性13例,女性11例;平均年龄29.2岁;下颌23例,上颌1例.X线片示呈单囊性边界清楚透光区.病理表现分三型:(1)腔内型(丛状单囊成釉细胞瘤)7例,(2)壁内型(壁成釉细胞瘤)10例,(3)混合型7例,未见WHO第一型牙源性囊肿早期成釉细胞瘤变.结论:单囊型成釉细胞瘤的临床和X线表现无特征性,其确诊主要依靠组织病理学.     

bcl—2,Bax基因与程序化细胞死亡在颞下颌关节发育 …

目的 探讨程序化细胞死亡（ｐｒｏｇｒａｍｍｅｄ ｃｅｌｌ ｄｅａｔｈ,ＰＣＤ）及ｂｃｌ－２、Ｂａｘ基因在颞下颌关节发育中的作用。方法 利用缺口末端转移酶标记法（ｔｄｔ－ｍｅｄｉａｔｅｄ ｄＵＴＰ ｎｉｃｋ ｅｎｄ ｌａｂｅｌｉｎｇ,ＴＵＮＥＬ法）、原位杂交检测ｍＲＮＡ技术及免疫组织化学染色分别对ＳＤ胎鼠及生后１周颞下颌关节发育不同时期ＰＣＤ、ｂｃｌ－２ｍＲＮＡ及ｂｃｌ－２、Ｂａｘ蛋白的表达进行了观     

Ets—1在颌骨骨肉瘤中的表达

目的：分析Ｅｔｓ－１（Ｅ２６ ｔｒａｎｓｆｏｒｍａｔｉｏｎ－ｓｐｅｃｉｆｉｃ）在颌骨骨肉瘤的表达及意义。方法：采用免疫组织化学ＡＢＣ法检测Ｅｔｓ－１蛋白在２０例颌骨骨肉瘤和８例软骨瘤中的表达。结果：５５％（１１／２０）的骨肉瘤中Ｅｔｓ－１呈阳性表达，阳性表达率在各病理学分型间无显著性差异（Ｐ〉０．０５），而转移组明显高于未转移组（Ｐ〈０．０５）；１２．５％（１／８）的骨软骨瘤呈Ｅｔｓ－１阳性，与骨     

实验性动物癌前损害和癌的凝集素受体变化研究

本文用６种生物素化的凝集素对仓鼠颊囊正常上皮和实验性癌前损害和癌进行了组织化学研究．其结果表明：正常的仓鼠颊囊上皮有５种凝集素染色阳性，但在上皮各层的染色不同；对５种病变组织的染色发现，过度角化的凝集素染色同正常组织．不典型增生的凝集素染色有明显差异，尤其是重度不典型增生的染色改变，在多数情况下同癌的改变．ＷＧＡ的染色在正常仓鼠颊囊上皮与正常人的口腔上皮相似，ＷＧＡ在不同病变组织中呈现不同的染色图像，说明ＷＧＡ可作为口腔癌前损害监测和癌的恶性程度分级指标：ＲＣＡ、ＵＥＡ、ＤＢＡ和ＢＳＬ在不同病变组织中的动态变化均说明，凝集素受体的异常表达是组织不良增生的一个指征；凝集素受体的消失是癌变的一个信号．     

成釉细胞瘤中Ki-67的表达及其临床意义

目的　检测Ki-67抗原在不同组织类型成釉细胞瘤中的表达情况,以探讨不同组织类型成釉细胞瘤的细胞增殖能力差异及其相应的临床意义。方法　采用LsAB免疫组织化学方法,对70例成釉细胞瘤进行染色, 并采用Sopt及IPP图像分析系统半定量分析Ki-67阳性染色指数。结果　恶性成釉细胞瘤的阳性染色指数最高 14·72%±2·87%,其次为实性成釉细胞瘤,其中以滤泡型4·42%±1·05%高于丛状型3·64%±1·23%,单囊型最低 2·21%±1·09%。结论　Ki-67所反映的不同组织类型成釉细胞瘤的细胞增殖能力的差异,可能与其术后复发率的高低有关。     

妊娠与正畸牙移动的实验研究：孕酮对妊娠期大鼠牙？…

通过移动妊娠期及非妊娠期成年ＳＤ大鼠上前牙，采用ＨＥ染色对比观察牙周组织的变化情况，并用免疫组织化学ＡＢＣ法在原位上确定牙周组织中孕酮的分布，探讨了妊娠期间孕酮在牙周组织改建中的作用，结果显示：１．组织学观察：妊娠组牙周组织成骨活跃，新骨形成增加．２免疫组织化学观察：成骨细胞为阳怀染色，且妊娠组织色较深。     

癌基因c－erbB－2、抗癌基因p53在涎腺良恶性肌上皮瘤中的表达及分析

应用免疫组化方法对４０例涎腺肌上皮瘤（ＭＥ）、肌上皮瘤细胞生长活跃（ＭＡＰ）、恶性肌上皮瘤（ＭＭＥ）进行了ｃ－ｅｒｂＢ－２、ｐ５３基因蛋白表达的研究。结果：ｃ－ｅｒｂＢ－２表达总的阳性率为４２．５％（１７／４０），其中ＭＥ为１６．７％（２／１２）．ＭＡＰ为３７．５％（３／８），ＭＭＥ为６０％（１２／２０），三者间有显著差异（Ｐ＜０．０５），ｐ５３表达总的阳性率为２５％（１０／４０），ＭＥ，ＭＡＰ，ＭＭＥ三者间无显著差异（Ｐ＞０．０５）．ｃ－ｅｒｂＢ－２与ｐ５３在该瘤中的表达无相关性，结果表明ｃ－ｅｒｂＢ－２和ｐ５３的过量表达可能参与了涎腺肌上皮瘤的发生和分化过程；特别是癌基因ｃ－ｅｒｂＢ－２的检测对鉴别该瘤的良、恶性及早期诊断有一定的意义。     

Calretinin Expression in Unicystic Ameloblastoma: An Aid in Differential Diagnosis

Calretinin is a 29 kDa calcium-binding protein, which is widely expressed in the central and peripheral neural tissue. It has also been demonstrated in odontogenic epithelium during odontogenesis and in neoplastic odontogenic tissues. The lining epithelium of eight cases of unicystic ameloblastoma, six cases of dentigerous cyst, six cases of odontogenic keratocyst, reclassified as keratocystic odontogenic tumor (KCOT), and four cases of solid/multicystic ameloblastoma was examined for the expression of calretinin. No positive staining was observed in any of the dentigerous cysts and keratocystic odontogenic tumor linings. In comparison, coarse dark brown staining was seen in the stellate reticulum of solid multicystic ameloblastoma and more superficial epithelial layers of unicystic ameloblastoma. In conclusion, we have highlighted calretinin to be a specific immunohistochemical marker for neoplastic ameloblastic tissue that can be used as an important diagnostic aid in the differential diagnosis of unicystic ameloblastoma and cystic odontogenic lesions.     

Lectin histochemistry of cystic jaw lesions: an aid for differential diagnosis between cystic ameloblastoma and odontogenic cysts

The binding sites for Ulex europaeus agglutinin I (UEA-I), Bandeirea simplicifolia agglutinin I (BSA-I), and peanut agglutinin (PNA) were comparatively examined in the surgical materials from 41 cases of cystic and solid ameloblastomas and 42 cases of non-neoplastic odontogenic cysts including dentigerous cyst, odontogenic keratocyst, and radicular cyst. In non-neoplastic cysts, most of epithelial lining layers gave positive binding with UEA-I and BSA-I. However, no positive reactions were obtained for these two lectins in the epithelial components of ameloblastoma, except for limited UEA-I binding to markedly keratinized tumor cells in four cases. PNA binding was irregular and did not make any clear distinction between ameloblastomas and cysts. The results suggest that the lectin staining for UEA-I and BSA-I is a useful histologic aid for differential diagnosis between cystic ameloblastoma and non-neoplastic jaw cysts.     

Conservative management of unicystic ameloblastoma in a young child: Report of two cases

Unicystic ameloblastoma is a rare, benign, locally invasive odontogenic neoplasm of young age that show clinical, radiographic, or gross features of an odontogenic cyst, but histologically shows typical ameloblastomatous epithelium lining part of the cyst cavity, with or without luminal and/or mural tumor growth. The article presents atypical cases of a large, asymptomatic unicystic ameloblastoma of posterior maxilla and mandibular molar-ramus regions which were treated by surgical enucleation and application of Carnoy's solution for 3 min. The article also describes the importance and complexity of differential diagnosis of an odontogenic lesion sharing common clinical and radiographical features.     

Unicystic ameloblastoma of the maxilla: a case report

Unicystic ameloblastoma is believed to be less aggressive and responds more favorably to conservative surgery than the solid or multicystic ameloblastomas. This report is a rare case of unicystic ameloblastoma of the maxilla that was treated by enucleation under suspicion of a radicular cyst related to a dens in dente. The neoplastic nature of the lesion became evident only when the enucleated material was available for histologic examination. With this report, the authors illustrate the importance and complexity of a differential diagnosis of lesions with a cystic aspect in the anterior region of the maxilla, among them - inflammatory radicular cysts, odontogenic keratocysts, adenomatoid odontogenic and unicystic ameloblastoma. Relevant diagnostic problems and choice of treatment of unicystic ameloblastoma are presented along with a review of the literature.     

Unicystic ameloblastoma in the sudan

7 Sudanese patients, 4 females and 3 males, aged 15 to 56 years, were seen with a preoperative diagnosis of odontogenic cyst. The lesions were removed via conservative surgical enucleation. The histological interpretation was unicystic ameloblastoma. Despite the conservative treatment, all 7 patients are free of recurrence up to 6 years after surgery.     

Calcifying odontogenic cyst. A review of ninety-two cases with reevaluation of their nature as cysts or neoplasms, the nature of ghost cells, and subclassification.

Ninety-two cases of calcifying odontogenic cyst (COC) were reviewed with special consideration of their nature as cysts or neoplasms, the nature of ghost cells, and classification on the basis of clinicopathologic features. The cases were divided into 79 (85.9%) cysts and 13 (14.1%) neoplasms. The cysts occurred as four variants: (1) nonproliferative COC (35 cases), characterized by a simple unicystic structure; (2) proliferative COC (17 cases), characterized by a cystic structure with multiple daughter cysts, extensive ghost cell formations, and marked tendency for calcification; (3) ameloblastomatous COC (11 cases), characterized by ameloblastoma-like, cyst-lining epithelium with ghost cells and calcifications; and (4) COC associated with odontoma (16 cases), which combined features of COC and odontoma. The neoplasms occurred as three variants: (1) ameloblastoma ex COC (two cases), which showed unifocal and multifocal intraluminal and intramural ameloblastoma proliferating from the COC-lining epithelium; (2) peripheral epithelial odontogenic ghost cell tumor (eight cases), which occurred in the gingiva and resembled peripheral ameloblastoma except for clustered ghost cells in the central portion of epithelial islands and the presence of juxtaepithelial dentinoid; and (3) central epithelial odontogenic ghost cell tumor (three cases). The latter showed ameloblastomatous or adenomatoid odontogenic tumor-like epithelial clusters with ghost cell formation and juxtaepithelial dentinoid. The clinical features of cystic and neoplastic variants were tabulated and described. On the basis of histopathologic features and their immunohistochemical reaction to polyclonal antikeratin antibody, it is suggested that ghost cells might be the result of coagulative necrosis.     

Lectin histochemistry of ameloblastomas and odontogenic keratocysts

The cell membrane carbohydrate components of 10 simple (follicular and/or plexiform pattern) and 5 acanthomatous ameloblastomas, one plexiform unicystic ameloblastoma, one soft tissue ameloblastoma and 11 odontogenic keratocysts were studied in paraffin-embedded tissues using horseradish peroxidase-conjugated lectins. The presence of glucose and mannose was demonstrated by intense labelling with Concanavalin ensiforme (Con A) in 73% of the ameloblastomas examined, while periodate oxidation of the specimens prior to Con A (PA/Con A) stained 53% of the cases. Ameloblastomas did not express receptors for Triticum vulgaris (WGA), Erythrina chrystagalli (ECA), Arachis hypogea (PNA), and Ulex europaeus (UEA-1). The plexiform unicystic ameloblastoma and the soft tissue ameloblastoma examined showed the same cell membrane glycoproteins as the simple and acanthomatous ameloblastomas. Forty-five per cent of the keratocysts demonstrated Con A reactivity from the basal to the keratinized layer, while 72% of these specimens showed positive PA/Con A reactivity from the parabasal to the keratinized layer. Staining with WGA, ECA, PNA, and UEA lectins also revealed the presence of N-Acetyl-glucosamine and fucose oligosaccharides in the plasma membrane of basal, spinous and keratinized cell layers of the odontogenic keratocysts. The distinct cell surface carbohydrate composition of the ameloblastoma and odontogenic keratocyst may be responsible for the differences in biological behavior in these conditions.