Erythematous and reticular forms of oral lichen planus and oral lichenoid reactions differ in pathological features related to disease activity

BACKGROUND: Common clinical forms of oral lichen planus (OLP) and oral lichenoid reactions (OLR) are erythematous (ERY) or reticular (RET). The purpose of this study was to find histopathological changes that differ between these forms. METHODS: Epithelial thickness, epithelial proliferation rate, apoptosis, and HLA-DR expression were compared among 10 reticular and 12 erythematous lesions, and 11 normal oral mucosa samples (NOM). RESULTS: The epithelium in ERY was thinner than in NOM, whereas RET showed values between ERY and NOM. Cell proliferation increased significantly in ERY as compared with RET and NOM, with no difference between RET and NOM. Relative numbers of epithelial cell nuclei displaying visible chromatin condensation were reduced in ERY form. CONCLUSIONS: The markedly increased cell proliferation in ERY supports the notion that this form displays a higher disease activity as compared to RET. It can therefore be important to study each disease form separately.     

Hypophyseal Non-Hodgkin's Lymphoma presenting with clinical panhypopituitarism successfully treated with chemotherapy

Summary A patient is described with a testicular Non-Hodgkin's Lymphoma (NHL) presenting with panhypopituitarism caused by a hypophyseal localization. A⁶⁷Gallium scintigraphy showed avid uptake in the hypophyseal region. Obviously⁶⁷Gallium could reach the tumor, by the intravenous route, which was the reason to treat the patient with intravenous chemotherapy. A complete remission was induced, which seems to be lasting (+ 25 months). As far as we know this is the first report of panhypopituitarism caused by a hypophyseal NHL in the hypophysis and successfully treated by intravenous chemotherapy.     

P糖蛋白和Ki-67抗原表达对肺癌T/NT的影响

目的:研究肺癌放射导向手术中肿瘤及正常组织P糖蛋白(P-gp)、Ki-67抗原表达与放射性核素摄取比(T/NT)的关系.方法:采用免疫组化方法和显微图像分析技术,测定32例接受放射导向手术的肺癌病人P-gp和Ki-67抗原表达,分析P-gp和Ki-67的标记指数(LI)与T/NT之间的相关性.结果:P-gp和Ki-67的LI和肺癌病人T/NT之间均有相关性(r=-0.61,P=0.0002; r=0.75,P=0.0001).结论:Ki-67的LI越高(肿瘤增殖越旺盛),T/NT值越高;P-gp阳性的肿瘤,T/NT值较低.     

幕上星形细胞肿瘤MRI表现与VEGF、P16、Ki-67相关性研究

探讨星形细胞肿瘤MRI表现与P16、Ki—67、血管内皮生长因子(vascular endothelial growth factor，VEGF)表达的相关性。材料和方法：收集我院术前经MRI诊断并经手术病理证实的幕上星形细胞肿瘤53例，行常规平扫描后静脉注射Gd—DTPA增强成像；同时采用HE染色及链菌素生物素—过氧化酶连接法进行VEGF、Ki—67、P16的免疫组织化学染色，测定它们的表达指数。结果：星形细胞肿瘤的信号不均匀性、坏死、水肿、占位效应、强化程度与VEGF、Ki—67、P16的表达相关，且随着星形细胞肿瘤恶性程度的增高VEGF、Ki—67的表达增加；P16的表达率降低。结论：星形细胞肿瘤的MRI表现与VEGF、Ki—67、P16的表达密切相关，MRI可以间接判断星形细胞肿瘤的某些生物学行为。     

Revisiting the prognostic role of gallium scintigraphy in low-grade Non-Hodgkin’s lymphoma

The purpose of this study was threefold: to evaluate the role of gallium-67 scintigraphy in the staging of low-grade non-Hodgkin’s lymphomas (LGNHL), to assess the relationship between the expression of CD71 on the surface of the neoplastic cells and the ⁶⁷Ga uptake by the tumour, and to establish the contribution of ⁶⁷Ga scan in defining the prognosis of LGNHL. Forty-eight patients with untreated LGNHL diagnosed in a single institution over a decade were reviewed. The end point of the study was survival of the patients according to the scintigraphic ⁶⁷Ga score at diagnosis. In addition to ⁶⁷Ga scan, other prognostic variables were studied, relating to the neoplastic burden, the biology of the tumour and the host. Univariate and multivariate analyses were used. ⁶⁷Ga scan identified only 116/286 (41%) nodes involved by lymphoma that were detected by clinical examination or computed tomography scan. A scintigraphic scoring system with an arbitrary cut-off value of 3 (high scan score) was able to predict patients with a dismal prognosis: with a mean follow-up of 47 months (range: 1–146 months) the median survival time was 28 months in patients with a high scan score and 74 months in patients with a low scan score (P=0.002). CD71 values were 27.4%±14.9% (mean ±SD) in the former and 8.9%±7.2% in the latter (P=0.0001). Only performance status and extranodal sites were significant variables for prognosis in multivariate analysis. It is concluded that ⁶⁷Ga scan is inaccurate in staging but might be very important in defining the prognosis in LGNHL, in association with other prognostic variables. Received 1 May and in revised form 6 August 1997     

The relationship of proliferating cell density at the invasive tumour front with prognostic and risk factors in human oral squamous cell carcinoma

BACKGROUND: We hypothesise that the density of proliferating cells at the invasive tumour front (ITF) has a positive relationship with prognostic and risk factors in human oral squamous cell carcinoma (SCC). METHODS: Tissues from 47 human oral SCC specimens were collected and stained with a monoclonal antibody directed against the Ki-67 antigen using a horseradish peroxidase based two-step immunostaining method. Counting was performed on two parallel sections at the ITF using an image analyser. The Ki-67 labelling index (LI) was determined by measuring the number of nuclei/mm(2) of epithelium. RESULTS: Our results show that the density of proliferating cells is related to clinical staging, with advanced stage of disease having a significantly higher Ki-67 LI compared with early stage of disease (2111 +/- 905 vs. 1908 +/- 913; P = 0.03). Importantly, this study shows that tumours that have metastasised have a significantly higher Ki-67 LI than tumours where distant metastasis was not detected (3257 +/- 650 vs. 1966 +/- 881; P < 0.0001). CONCLUSIONS: Cell proliferation, as measured by the Ki-67 LI at the ITF, has a positive relationship with clinical staging, tumour thickness, smoking status of the patient and alcohol consumption. Further, we suggest that a multicenter study with a large cohort of patients is indicated to fully elucidate whether cell proliferation at the ITF is directly related to patient survival.     

Ki67、P53及微血管密度在大肠肿瘤中的表达

目的 研究Ki67、P53及微血管密度(microvessel density,MVD)在大肠肿瘤中的表达,探讨其与大肠肿瘤癌变的关系及作为早期癌变生物学标志物的可能性。方法 采用免疫组化技术分别测定正常大肠黏膜、大肠息肉及大肠癌组织标本中Ki67、P53及MVD值,共80例,分析其变化规律及相关性。结果 在正常黏膜、大肠息肉、大肠癌组中的Ki67标记指数逐渐增高(分别为11.00±10.70、39.64±17.70、52.96±26.40),组间比较差异显著(P=0.0001)。正常黏膜组P53蛋白均为阴性,大肠癌组P53蛋白表达的阳性率明显高于息肉组(P=0.0001)。Ki67、P53蛋白表达与性别、年龄、病程、病变部位、大小、大肠癌的病理类型、Dukes分期均无相关性。正常黏膜、大肠息肉、大肠癌组的MVD值(14.80±5.10、19.70±7.84、36.56±20.40)逐渐上升,3组差别显著(P=0.0001)。大肠癌中Dukes C、D期的MVD值(40.56±3.49)明显高于A、B期(29.50±2.45)(P=0.016)。Ki67与P53在各种组织中的表达呈正相关(r=0.5149,P=0.015)。联合检测Ki67及P53鉴别大肠良恶性病变的敏感度(70.37％)低于单侧Ki67(96.30％),但特异度(94.34％)明显增高。结论 Ki67标记指数可反映细胞增殖状态,指数高的大肠腺瘤易发生癌变。MVD值高的大肠癌易发生转移,MVD可作为判断大肠癌预后的参考指     

The proliferation rate of intracranial tumors as defined by the monoclonal antibody KI 67. Application of the method to paraffin embedded specimens

60 intracranial tumors have been studied immunohistochemically to determine the proliferation rate by staining for the monoclonal antibody KI-67, which recognizes a nuclear antigen expressed by cells in proliferation. In gliomas a clear correlation of stained nuclei to the histologically determined degree of malignancy was found: slow growing astrocytomas and oligodendrogliomas had an average proliferation rate of 1%, more malignant forms of 7–10%. Glioblastomas were found to have a growth fraction of 15%. Metastases had an even higher rate of 20% proliferating cells. In meningiomas the proliferation rate was mainly about 1%, but in three cases it was between 5% and 7%. Whether this is indicative for a higher risk of tumor recurrence, remains to be correlated to the clinical course. Hemangiopericytomas had a proliferation rate of 9% and 16%, respectively, the latter recurring within four months. It may be concluded from the results of this study, that investigation of intracranial tumors with KI 67 may be of prognostic value and can possibly contribute to an individualized tumor therapy.     

多激素分泌性垂体泌乳素腺瘤的激素分泌谱及克隆分析

目的 对多激素分泌性垂体泌乳素腺瘤的克隆状态以及激素分泌谱进行分析。方法 对26例女性垂体泌乳素腺瘤患者（单激素分泌性PRL腺瘤7例，多激素分泌性PRL腺瘤19例）进行肿瘤标本的免疫组化分析，并且提取DNA行HUMARA分析。结果免疫组化分析提示本组多激素分泌性垂体PRL腺瘤具有10种不同的激素分泌谱，现代分子生物学HUMARA克隆分析提示11／13例（85％）多激素分泌性垂体PRL腺瘤为单克隆起源。结论 结果提示垂体泌乳素腺瘤除了分泌泌乳素外，还可以分泌多种垂体激素，而且绝大多数多激素分泌性垂体腺瘤的起源是单克隆性的。     

Ki-67、增殖细胞核抗原、P53在脑膜瘤中的表达及意义

目的 :通过对 Ki- 6 7、增殖细胞核抗原、P5 3在脑膜瘤中的表达 ,进一步研究其与肿瘤的良、恶性及肿瘤复发的关系 ,从而更好判断其生物学行为。方法 :行脑膜瘤全切除手术治疗 ( Simpson's Grade or Grade )并经 9～12 4个月 ( 4 8± 9)随访的 6 0例 ,采用 SP免疫组化法 ,检测手术切除石蜡包埋的肿瘤标本的 Ki- 6 7、增殖细胞核抗原、P5 3抗原 ,以显微镜下的细胞核内出现棕色颗粒为阳性 ,计算 3者的标记指数 ( L abeling Index) .对患者的临床资料与肿瘤细胞的标记指数的差异性进行统计学分析。结果 :Ki- 6 7、增殖细胞核抗原、P5 3在不同病理形态脑膜瘤中的表达具有显著性差异 ( P<0 .0 5 ) ,恶性脑膜瘤、非典型性脑膜瘤中的表达明显高于良性脑膜瘤 ;同样在复发性脑膜瘤中其表达也明显高于非复发性脑膜瘤 ( P<0 .0 5 ) ;良性脑膜瘤中 Ki- 6 7、增殖细胞核抗原的表达在复发组明显高于非复发组 ( P<0 .0 5 ) ,而 P5 3的表达在复发组与非复发组无统计学意义 ( P>0 .0 5 )。结论 :( 1) Ki- 6 7、增殖细胞核抗原、P5 3的表达与病理分型和脑膜瘤术后复发有关。 ( 2 )良性脑膜瘤结合 Ki- 6 7、增殖细胞核抗原的表达情况可用来判断预后即有无复发的可能 ,从而进一步来指导临床治疗