Rapidly progressing malignant phyllodes tumor of the prostate with normal prostate-specific antigen levels: A case report

Malignant phyllodes tumor of the prostate is a very rare entity. Here, we describe a 51-year-old patient with a malignant phyllodes tumor of the prostate with a poor prognosis and normal prostate-specific antigen levels. Digital rectal examination revealed a hard, nodular mass in the prostate, and magnetic resonance imaging exhibited a cystic mass measuring 8.7 cm × 7.0 cm × 6.7 cm. Immunohistochemical staining showed that the epithelial components were positive for CK8/18 and cytokeratin AE1/AE3; the atypical stromal cells were positive for CD34 and vimentin. Histological analysis resulted in a diagnosis of malignant phyllodes tumor of the prostate. Radical surgery was the treatment of choice. However, tumor recurrence was identified 6 months after the surgery, and the patient died 10 months after the surgery.

Preoperative Diagnosis of Upper Gastrointestinal Leiomyoma by Endoscopic Ultrasound-guided Fine Needle Aspiration

Aims: To evaluate the role of endoscopic ultrasonography-guided fine needle aspiration (EUS-FNA) with using immunohistochemical analysis in the preoperative diagnosis of upper gastrointestinal leiomyoma.StudyDesign:This was ’prospective’observational study.Place and Duration of Study: Department of surgery No1, Vinnytsia National Pirogov Medical University,Vinnytsia, Ukraine; betweenSeptember 2016 and February 2019. Methodology:Sixteen prospectively studies have been performed using endoscopic ultrasonography-guided fine needle aspiration (EUS-FNA) in patients with submucosal hypoechoic tumors (according to the results of previous gastroduodenoscopy) with continuity to proper muscle layer suspected asleiomyoma of upper gastrointestinal tract. All cases for the final diagnosis underwent surgery (n = 16). Additionally, immunophenotyping of specimens obtained by EUS-FNA and surgical resection specimens have been compared. Results:The puncture has been performed in all patients without any anatomical problems. The collection rate of adequate specimens from the GI tract subepithelial hypoechoic tumor with continuity to proper muscle layer was 87, 5%. The diagnostic rate for the tumor less than 2 cm, 2 to 4cm, and 4 cm or more were 77, 8%, 100% and 100% respectively. In 16 surgically resected cases, the sensitivity, specificity, positive predictive value, negative predictive value, and diagnostic accuracy of EUS-FNA using immunohistochemical analysis of leiomyoma were 100%; 83,3%; 90,9%; 100% and 93,75% respectively. No major complications were encountered.Conclusion:EUS-FNA with immunohistochemical analysis is a safe and accurate method in the preoperative diagnosis of gastrointestinal leiomyoma. It should be taken into consideration in decision making, especially in early diagnosis following minimal invasive surgeryfor gastrointestinal leiomyoma.

Decreased expression of chromodomain helicase DNA-binding protein 9 is a novel independent prognostic biomarker for colorectal cancer

Previous studies suggested that chromodomain helicase DNA-binding proteins (CHDs), including CHD 1-8, were associated with several human diseases and cancers including lymphoma, liver cancer, colorectal cancer, stomach cancer, etc. To date, little research on CHD 9 in human cancers has been reported. In this study, we assessed the prognostic value of CHD 9 in patients with colorectal cancer (CRC). We screened for CHD 9 expression using immunohistochemical analysis in 87 surgical CRC specimens and found that the expression was upregulated in 81.5% of the cases, while 7.4% were decreased; in the remaining 11.1% of the cases, levels were not altered. Kaplan-Meier analysis showed that patients with high CHD 9 expression had better prognosis than those with low CHD 9 expression (54.5 vs 32.1%, P=0.034). Subsequently, Cox multi-factor survival regression analysis revealed that expression of CHD 9 protein was an independent predictor for CRC, with a hazard ratio of 0.503 (P=0.028). In addition, we found that CHD 9 expression was positively correlated with MSH2 (rs=0.232, P=0.036). We speculated that CHD9 might be a putative tumor suppressor gene, and could inhibit the development of CRC by participating in DNA repair processes. Our findings suggest that CHD 9 could be a novel prognostic biomarker and a therapeutic target for CRC. Further studies are needed to detect the effect of CHD 9 on cellular function and the expression of mismatch repair genes.

Effect of Longzhu Ointment on Allergic Contact Dermatitis / 中国药师

Objective: To explore the effect and mechanism of Longzhu ointment in the treatment of allergic contact dermatitis.Methods: Allergic contact dermatitis mouse model was induced by dinitrobenzene (DNFB) and the mice were randomly divided into the model group, matrix group, Longzhu ointment group and hydrocortisone butyrate group.0.5% DNFB was used for sensitization on abdomen of mice one and two days before the administration, and 0.2% DNFB was used on the right ears of mice after 6-day administration to establish mouse ACD model.A day after the excitation of dermatitis, the ear swelling degree was determined, the changes of histopathology was observed, and the immunohistochemical methods were performed to quantify the expression of TNF-γ and macrophage surface markers CD68 in the tissue samples.Results: The ear swelling degree in the group treated with Longzhu ointment was significantly reduced (P <0.01).Compared with the postive control group,the difference was not statistically significant(P＞0.05).HE staining showed that tissue edema decreased obviously.The immunohistochemistry analysis revealed that the expression of INF-γ in Longzhu ointment group was obviously reduced.Under the microscope with magnification of 200 times, CD68 positive cells in Longzhu ointment group was significantly reduced than those in the model group(P＜0.01).The expression of CD68 positive cells in butyric acid hydrocortisone group was not significantly different from that in Longzhu Ointment group.Conclusion: Longzhu ointment can inhibit allergic contact dermatitis obviously, and the mechanism may be related to the inhibition of lymphocyte secretion INF-γ and the reduction of macrophage infiltration.

Immunohistochemical analysis of the neural structures of the posterior cruciate ligament in osteoarthritis patients submitted to total knee arthroplasty: an analysis of thirty-four cases

OBJECTIVES: Many authors recommend posterior cruciate ligament-retaining arthroplasty with the intention to maintain the proprioception properties of this ligament. Preservation of the neuroreceptors and nervous fibers may be essential for retaining the proprioception function of the posterior cruciate ligament. The present study was thus developed to evaluate the presence of neural structures in the posterior cruciate ligament resected during posterior stabilized arthroplasty in osteoarthritis patients. In particular, clinical, radiographic and histological parameters were correlated with the presence or absence of neural structures in the posterior cruciate ligament. METHODS: In total, 34 posterior cruciate ligament specimens were stained with hematoxylin-eosin and Gomori trichrome. An immunohistochemical analysis using antibodies against the S100 protein and neurofilaments was also performed. The presence of neural structures was correlated with parameters such as tibiofemoral angulation, histological degeneration of the posterior cruciate ligament, Ahlbäck radiological classification, age, gender and the histologic pattern of the synovial neurovascular bundle around the posterior cruciate ligament. RESULTS: In total, 67.5% of the cases presented neural structures in the posterior cruciate ligament. In 65% of the cases, the neurovascular bundle was degenerated. Nervous structures were more commonly detected in varus knees than in valgus knees (77% versus 50%). Additionally, severe histologic degeneration of the posterior cruciate ligament was related to neurovascular bundle degeneration. CONCLUSIONS: Severe posterior cruciate ligament degeneration was related to neurovascular bundle compromise. Neural structures were more commonly detected in varus knees. Intrinsic neural structures were detected in the majority of the posterior cruciate ligaments of patients submitted to knee arthroplasty for osteoarthritis. .

Analysis of the Neoplastic Nature of Odontogenic Keratocyst and its Comparison with other Selected Benign Odontogenic Tumours: An Immunohistochemical Analysis

Odontogenic keratocyst (OKC) first described by Philipsen in 1956 constitutes approximately 11% of all cysts of the jaws. Adenomatoid odontogenic tumour (AOT) is an uncommon, benign epithelial lesion of odontogenic origin. The aim of this study was to analyse the expression of Bcl-2 in OKC and its comparison with other selected benign odontogenic tumours (OTs). Ten formalin fixed paraffin embedded blocks of OKCs, five each of AOT and unicystic ameloblastoma Bcl-2 protein is characterized by its ability to inhibit apoptosis. OKC were characterized by higher expression of Bcl-2 in basal cell epithelium. AOT and unicystic ameloblastoma differed from OKC in a wide spectrum of apoptosis and/or cell cycle-related protein expressions, higher proliferation in the basal cell layer, and vice versa, lower proliferation in the suprabasal cell layer. The solitary OKC seems to be less biologically aggressive and should be classified as a cyst rather than a tumour, means that at least few of OKCs manifests as ordinary cysts. Some of the present study findings could support the theory that OKCs are with high proliferative, probably that these lesions are developmental cysts with some neoplastic properties because of the high intrinsic growth potential. WHO recommends the term KCOT as it better reflects the neoplastic nature of the lesion; however, this reclassification has not yet been universally accepted.

Immunohistochemical diagnostics in stomach cancer / Монголын Анагаах Ухаан

Although stomach cancer immunohistochemistry is similar tothe immunohistochemistry of other organ, it has great impact on diagnosis and treatment, such as its ability to reveal whether the cancer is primary or metastatic and which treatment model would be more effective in individual case. Lately, CK7, CK20 and CDX-2 immunohistochemical markers are commonly used in stomach cancers. Stomach cancer prognosis is different in each patient, depending on several factors, patients’ health status, cancer cell differentiation, and cancer cell growth. To evaluate these factors,immunohistochemic al analysis is more effective and for this purpose they use Ki-67, CD 34, BCL-2, p53, Cyclin D1, andHer- 2 markers.The evaluation of HER-2 expression should be carefully carried out, as following: 1. HER-2 expression should be evaluated on minimum 5 positive stained cells. The evaluation criteria aremicroscopic magnification and cytoplasmic membrane-stained pattern. 2. Other than the membrane-stained pattern must be excluded. HER2 gene evaluation (FISH) can confirm the HER2 IHCexpression. 3. Usage of FDA approved antibody (4B5) has the advantageof increased sensitivity. 4. The algorithm for the evaluation of HER-2 expression used for breast cancer has 50% possibility of false negativity if it is used for stomach cancer. Therefore, it is needed to beevaluated with another specific algorithm. Because HER-2 2+ and 3+ cases can improve outcome with usingTrastizumab treatment.

Optimized Immunohistochemical Analysis of Cerebellar Purkinje Cells Using a Specific Biomarker, Calbindin D28k

Cerebellar Purkinje cells (PCs) play a crucial role in motor functions and their progressive degeneration is closely associated with spinocerebellar ataxias. Although immunohistochemical (IHC) analysis can provide a valuable tool for understanding the pathophysiology of PC disorders, the method validation of IHC analysis with cerebellar tissue specimens is unclear. Here we present an optimized and validated IHC method using antibodies to calbindin D28k, a specific PC marker in the cerebellum. To achieve the desired sensitivity, specificity, and reproducibility, we modified IHC analysis procedures for cerebellar tissues. We found that the sensitivity of staining varies depending on the commercial source of primary antibody. In addition, we showed that a biotin-free signal amplification method using a horseradish peroxidase polymer-conjugated secondary antibody increases both the sensitivity and specificity of ICH analysis. Furthermore, we demonstrated that dye filtration using a 0.22 micrometer filter eliminates or minimizes nonspecific staining while preserving the analytical sensitivity. These results suggest that our protocol can be adapted for future investigations aiming to understand the pathophysiology of cerebellar PC disorders and to evaluate the efficacy of therapeutic strategies for treating these diseases.

Microwave Fixation in Rat Fetuses Tissues: Histological and Immunohistochemical Analysis / Fijación de tejidos de Fetos de Ratas por Microondas: Análisis Histológico e Inmunohistoquímico

The aim of this study was to show the microwaves action in fixation of rat fetuses, dermal and cartilaginous tissues, using histological and immunohistochemistry methods for analysis. It was possible to conclude in this study using the rat as experimental model that the two methods for antibody retrieval, presented an excellent ways for the use of Ki67 antibody in the immunohistochemical analysis.

El objetivo de este estudio fue evaluar la acción de las microondas en la fijación de los tejidos dérmico y cartilaginoso de fetos de ratas, usando para el análisis métodos histológico e inmunohistoquímico. Fue posible concluir en este estudio usando la rata como modelo experimental, que los dos métodos empleados para la recuperación antigénica representan excelentes medios para el uso del anticuerpo Ki67, en el análisis inmunohistoquímico.

Toxoplasmosis in squirrel monkeys: histological and immunohistochemical analysis

Necropsy findings in three cases of naturally occurring toxoplasmosis in squirrel monkeys (Saimiri sciureus) obtained as wild catches from the Amazon region were described. Histopathological evaluation of the liver, spleen, kidneys and mesenteric lymph nodes showed multiple foci of inflammation and necrosis. Typical, well-defined morphologic Toxoplasma gondii cysts and free forms of the parasite were found by immunoperoxidase staining within inflammatory infiltrates. The presence of T. gondii in the studied colony could severely influence the results of experiments performed in the animals.

Achados de necropsia em três casos de toxoplasmose ocorridos naturalmente em macacos-de-cheiro (Saimiri sciureus) obtidos de capturas na região Amazônica foram descritos. A avaliação histopatológica do fígado, baço, rins e linfonodos mesentéricos mostrou múltiplos focos de inflamação e necrose. Cistos morfológicos típicos e bem definidos de Toxoplasma gondii e formas livres foram detectados pelo método da imunoperoxidase com infiltrados inflamatórios. A presença de T. gondii na colônia de primatas estudada pode influenciar severamente os resultados de experimentos realizados nos animais.

The Clinicopathological Factors That Determine a Local Recurrence of Rectal Cancers That Have Been Treated with Surgery and Chemoradiotherapy / 대한방사선종양학회지

PURPOSE: To evaluate the pathological prognostic factors related to local recurrence after radical surgery and adjuvant radiation therapy in advanced rectal cancer. MATERIALS AND METHODS: Fifty-four patients with advanced rectal cancer who were treated with radical surgery followed by adjuvant radiotherapy and chemotherapy between February 1993 and December 2001 were enrolled in this study. Among these patients, 14 patients experienced local recurrence. Tissue specimens of the patients were obtained to determine pathologic parameters such as histological grade, depth of invasion, venous invasion, lymphatic invasion, neural invasion and immunohistopathological analysis for expression of p53, Ki-67, c-erb, ezrin, c-met, phosphorylated S6 kinase, S100A4, and HIF-1 alpha. The correlation of these parameters with the tumor response to radiotherapy was statistically analyzed using the chi-square test, multivariate analysis, and the hierarchical clustering method. RESULTS: In univariate analysis, the histological tumor grade, venous invasion, invasion depth of the tumor and the over expression of c-met and HIF-1 alpha were accompanied with radioresistance that was found to be statistically significant. In multivariate analysis, venous invasion, invasion depth of tumor and over expression of c-met were also accompanied with radioresistance that was found to be statistically significant. By analysis with hierarchical clustering, the invasion depth of the tumor, and the over expression of c-met and HIF-1 alpha were factors found to be related to local recurrence. Whereas 71.4% of patients with local recurrence had 2 or more these factors, only 27.5% of patients without local recurrence had 2 or more of these factors. CONCLUSION: In advanced rectal cancer patients treated by radical surgery and adjuvant chemo-radiation therapy, the poor prognostic factors found to be related to local recurrence were HIF-1 alpha positive, c-met positive, and an invasion depth more than 5.5 mm. A prospective study is necessary to confirm whether these factors would be useful clinical parameters to measure and predict a radio-resistance group of patients.

Caracterización clínica y molecular de individuos con el síndrome frágil X detectados por análisis inmunohistoquímico / Clinical and molecular characterization of individuals with fragile X syndrome detected by immunohistochemical analysis

Se realizó el estudio de 50 varones con retraso mental y/o autismo de etiología desconocida a fin de detectar individuos afectados con el síndrome frágil X a través del análisis inmunohistoquímico y caracterizarlos clínica y molecularmente. Entre los casos pesquisados se detectaron 3 individuos con baja expresión de la proteína relacionada con el síndrome, a quienes se les realizó la caracterización molecular. La correlación inmunohistoquímica y molecular en 2 de ellos fue positiva. La no correlación de un tercero sugiere que pudiera tratarse de una mutación puntual o una deleción del gen relacionado con la enfermedad. En otro paciente con el fenotipo neuropsicológico y físico característicos de la enfermedad se observó una expresión promedio normal baja, lo que motivó la indicación de la caracterización molecular, que resultó ser positiva. Se discuten los mecanismos genéticos y fisiopatológicos que pudieran explicar la presencia de la proteína en las células analizadas.

50 males with mental retardation and/or autism of unknown etiology were studied aimed at detecting individuals affected with the Fragile X syndrome by the immunohistochemical analysis and at characterizing them from the clinical and molecular point of view. Among the screneed subjects, 3 individuals with low expression of the protein related to the syndrome were detected. Molecular characterization was performed in these cases. The immunohistochemical and molecular correlation was positive in 2 of them. The non correlation of the third suggests that it may be a punctual mutation or a deletion of the gene connected with the disease. In another patient with the neuropsychological and physical phenotype characteristic of the disease, it was observed an average normal low expression that led to the indication of the molecular characterization, which proved to be positive. The genetic and physiopathological mechanisms that could explain the presence of the protein in the analyzed cells are discussed.

The experimental study of the bone regeneration on beta-TCP in rabbit cranial bone

Pure-phase beta-tricalcium phosphate(beta-TCP) proved to be a bone regeneration material, providing the patient with vital bone at the defect site in a reasonable time, making a second surgical procedure for bone harvesting unnecessary. This study compares bone healing and BMP 2/4 expression in cranial defects in rabbits grafted with autogenous bone and beta-TCP. Thirty New Zealand White rabbits was divided into 3 group of 10 animals each. Bilateral calvarial defects were made in the parietal bones of each animal. beta-TCP placed in one defect and the other defects was filled with autogenous bone. The animal were sacrificed at 4, 8 and 12 weeks. Immunohistochemical analysis was used to investigate the expression of BMP 2/4. 1. The new bone formation around autogenous bone from 4 weeks and beta-TCP from 8 weeks. 2. In autogenous bone graft, BMP 2/4 expression was decreased from 4 to 12 weeks. 3. In beta-TCP graft, BMP 4 expression was increased from 8 to 12 weeks. But, BMP 2 was observed from 12 weeks. This study showed that bone healing, regeneration and, BMP 2/4 expression are delayed in grafted beta-TCP than autogenous bone.

A Study of the Expression of p53 and the Product of bcl-2 in Early and Advanced Gastric Cancers

PURPOSE: To evaluate of the role in carcinogenesis of p53 over-expression and bcl-2 inhibition in early gastric and advanced gastric cancers, we investigated the immunohistochemical tissue status of 31 primary early gastric-cancer patients and 31 primary advanced gastric-cancer patients. METHODS: DO7, the monoclonal antiserum to the P53 protein, and clone 124, the monoclonal antibody to the bcl-2 protein, were used for the immunohistochemical analysis of the 31 surgically resected primary early gastric cancer specimens and the 31 surgically resected advanced gastric-cancer specimens. The expressions were scored and divided into negative, positive, low expression, and overexpression. RESULTS: The clinicopathologic parameter; tumor depth of invasion, histologic type, and differentiation, were not related with the expression status of p53 or bcl-2. Of the 31 primary early gastric-cancer patients, 14 exhibited p53 overexpression and 16 showed negative the bcl-2 expression; 5 cases had both p53 overexpression and negative bcl-2 expression. Of the 31 advanced gastric cancer patients, 19 showed the p53 overexpression, and negative bcl-2 expression, 15 exhibited both p53 overexpression and negative bcl-2 expression. CONCLUSION: These results suggest that cell cycle alteration and apoptosis control by p53 and bcl-2 may play roles in the carcinogenesis of gastric cancer. However, there are many other mediators that may facilitate carcinogenesis. This study proved that bcl-2 is a valuable prognostic factor.

Immunohistochemical Analysis of the Expression of Cathepsin D in Human Gastric Adenocarninoma / 대한암학회지

PURPOSE: Cathepsin D is an acidic lysosomal proteinase involved in intracellular protein turnover. Increased levels of this enzyme have been reported to be indicators of aggressive tumor behavior in some human tumors. In gastric cancer, increased expression of cathepsin D has been reported to be an independent prognostic factor. MATERIALS AND METHODS: We used standard immunohistochemical techniques on formalin- fixed, paraffin-embedded tissues to examine the expression of the cathepsin D in fifty five gastric adenocarcinomas. And we compared these with other indicators of aggressive tumor behavior including stage of disease, tumor size, lymphatic invasion, neural invasion, Lauren classification, disease recurrence and survival. RESULTS: Positive granular cytoplasmic staining for cathepsin D was detected in 100% of the tumors and strongly positive staining was found in 53%. However, the intensity of the staining varied from cell to cell in the same carcinoma tissue as well as among samples. Positive staining also was seen in normal foveolar epithelial cells, parietal cells, macrophages and ganglion cells. Our results did not show any correlation between the expression of cathepsin D and other indicators of aggressive tumor behavior. But the group having more intensely stained margins showed the tendency to frequent lymphatic invasion. CONCLUSION: We conclude that the results obtained using polyclonal antibodies to cathepsin D do not support the prognostic usefulness of immunohistochemical analysis of this proteinase in tumor cells in human gastric adenocarcinoma, but this study may offer some useful indicator for further pathophysiological studies on gastric adenocarcinoma.

Expression of C-MET in thyroid carcinoma detected by rapid immunohistochemical analysis and its clinical significance for predicting lymph node metastases / 中国普通外科杂志

Objective To investigate expression of C-MET in palliary thyroid carcinoma(PTC) detected by rapid immunohistochemical analysis and its clinical significance to predicting lymph node metastases.Methods The expression level of C-MET was examined by rapid immunohistochemical analysis with C-MET-EPOS antibody in 85 cases of PTC.Results The rate of cervical lymph node metastates in PTC with strong positive stain expression(95.0%,23/25) was significantly higher than in PTC with positive stain expression(13.4%,8/60)(P