After the demonstration of tumour specific antigens by Foley (1953) and Prehn and Maine (1957) a ... more After the demonstration of tumour specific antigens by Foley (1953) and Prehn and Maine (1957) a great deal of experimental and clinical data have established the role of humoral immunity in various aspects of malignancy. Serum IgA have been studied in 15 cases of carcinoma nasopharynx and a significant increase in IgA levels observed have been correlated with the exposure of the mucosa of oral cavity to environment and its stimulation leading to increased synthesis of the secretary antibody (IgA). No correlation with tumour dissemination was observed. The role of Epstein-Barr virus leading to increase in IgA cannot be ruled out.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc, 1998
Cathepsin B is a lysosomal cysteine proteinase associated with degradation of laminin. It is incr... more Cathepsin B is a lysosomal cysteine proteinase associated with degradation of laminin. It is increased in colorectal carcinoma (CA). Laminin is a major component of basement membrane involved in cell-matrix interactions and tumor progression. The aim of this study was to correlate cathepsin B and tumor-associated laminin in colorectal adenomas (ADs) with increasing grades of dysplasia and in invasive CAs. Forty-five ADs (8 tubular, 16 tubulovillous, 21 villous), 13 adenomas with high-grade dysplasia/carcinoma in situ (AHDs), and 17 invasive CAs were immunostained with polyclonal antibodies to cathepsin B and laminin. Statistical analysis was performed using exact linear by linear association test and Spearman rank correlation coefficient. Cathepsin B-positive tumor cells were seen in 30 (67%) ADs, 13 (100%) AHDs, and 17 (100%) CAs. The grade of cathepsin B staining was significantly increased in AHDs and CAs, compared with ADs (P < .0001). Laminin was continuous in all of the ADs...
Cathepsin B, a lysosomal cysteine proteinase, is associated with degradation of laminin. Its acti... more Cathepsin B, a lysosomal cysteine proteinase, is associated with degradation of laminin. Its activity has been shown to be increased in gastric carcinomas. Laminin is one of the major components of basement membrane involved in cell-matrix interactions and tumor progression. The objectives of this study were to correlate cathepsin B expression in tumor cells with tumor-associated laminin and to further correlate the two with tumor progression. Resected gastric carcinomas (n = 29) taken from the surgical pathology files of the University of Massachusetts Medical Center, Worcester, were immunostained with cathepsin B and laminin using the avidin-biotin complex technique. Statistical analysis was performed using the exact linear by linear association test and exact Kruskal-Wallis test. Kaplan-Meier curves were plotted, and survival analysis was performed using a nonparametric log-rank test. Cathepsin B was expressed in 27 (93%) of 29 tumors (11 weak and 16 strong). Staining of tumor-as...
Solitary fibrous tumor (SFT) is an uncommon spindle cell neoplasm of increasing incidence that wa... more Solitary fibrous tumor (SFT) is an uncommon spindle cell neoplasm of increasing incidence that was originally described to be of pleural origin; however, more recently, SFT has been reported in extrapleural sites, including the orbit, liver, salivary glands, tongue, nose, paranasal sinuses, larynx, retroperitoneum, meninges, and thyroid. The increase in the number of SFTs does not necessarily mean increased incidence of this tumor but rather an increased understanding of this tumor, especially recognition of this tumor in extrapleural locations, which has been aided by immunohistochemical analysis. We report a case of SFT in the auditory canal, which to our knowledge has not been previously reported, as evident by morphologic findings and immunophenotype.
Myelolipomas are rare benign tumors composed of mature fat and hematopoietic elements. They are m... more Myelolipomas are rare benign tumors composed of mature fat and hematopoietic elements. They are most often discovered incidentally within the adrenal glands, with extra-adrenal myelolipomas being extremely rare tumors. We report a case of multifocal omental extra-adrenal myelolipoma in a patient who had undergone bilateral adrenalectomy. To our knowledge, this is the first reported case of an intraperitoneal extra-adrenal myelolipoma.
Pseudoangiomatous stromal hyperplasia (PASH) of the breast is a benign, proliferative mesenchymal... more Pseudoangiomatous stromal hyperplasia (PASH) of the breast is a benign, proliferative mesenchymal lesion with possible hormonal etiology. It typically affects women in the reproductive age group. Pseudoangiomatous stromal hyperplasia is frequently an incidental histologic finding in breast biopsies performed for other benign or malignant lesions. Rarely, it can present as a firm, painless breast mass, which has been referred to as nodular or tumorous PASH. Grossly, tumorous PASH is a well-circumscribed, firm, rubbery mass with solid, homogenous, gray-white cut surface. On histologic examination, it is characterized by the presence of open slitlike spaces in dense collagenous stroma. The spaces are lined by a discontinuous layer of flat, spindle-shaped myofibroblasts with bland nuclei. The spindle cells express progesterone receptors and are positive for vimentin, actin, and CD34. The most important differential diagnosis on histopathology is angiosarcoma. Pseudoangiomatous stromal h...
ABSTRACT The discovery in 1956 that Hashimoto’s thyroiditis is an autoimmune disease spelled the ... more ABSTRACT The discovery in 1956 that Hashimoto’s thyroiditis is an autoimmune disease spelled the end of the concept of horror autotoxicus and introduced the reality of human autoimmunity. Soon after, Graves’ disease was discovered to be directly caused by a serum factor, subsequently identified as an autoantibody. These diseases have served as invaluable models for the understanding of the organ specific autoimmunity. While Graves’ disease and Hashimoto’s thyroiditis are the two most common autoimmune thyroid diseases, autoimmune etiology has been also implicated in other forms of thyroiditides like Riedel’s, postpartum, silent and focal lymphocytic thyroiditis.
Immunohistochemical staining with a novel monoclonal antibody, KiSl, which recognizes a cell cycl... more Immunohistochemical staining with a novel monoclonal antibody, KiSl, which recognizes a cell cycle-associated antigen, was investigated in 142 cases of stage I and II invasive breast carcinoma. KiS 1 staining indices were compared with disease-free interval, overall ...
Infection Control & Hospital Epidemiology, 2007
Our goal was to assess the knowledge, attitudes, and practices regarding infection control and st... more Our goal was to assess the knowledge, attitudes, and practices regarding infection control and standard precautions among a group of nursing and midwifery instructors and students in Iran. A survey questionnaire was completed by 273 nursing and midwifery instructors and students at Shiraz University Medical Sciences during the period from May to November 2002. Two hundred thirty-one (90.9%) of the participants reported that they needed additional infection control education, especially on standard isolation precautions. There was a linear positive correlation between knowledge, practice, and attitude scores for the group of nursing, auxiliary nursing, and midwifery instructors, as well as their students (P < .05). Our study shows that there is an urgent need for evaluating education on infection control practices and standard precautions in general, as well as for structured infection control programs among nursing and midwifery staff.
ABSTRACT Previous studies have established that thyroid follicular neoplasms of higher malignant ... more ABSTRACT Previous studies have established that thyroid follicular neoplasms of higher malignant potential show a high p53 and low bc1-2 expression. This however has not been well studied in Oncocytic (Hürthle cell) neoplasms, the management of which remains controversial. We therefore studied the expression of p53 and bc1-2 in 18 Hürthle cell adenomas (HCA) and 8 Hürthle cell carcinomas (HCC) and compared them with their benign and malignant counterparts, respectively, including 16 follicular adenomas (FA) and 68 papillary carcinomas (PC). All 16 FA were bc1-2 positive, 4 were 2+, and 12 were 3+. On the other hand, 14/18 (78%) HCA showed bc1-2 expression, 5 were 1+, 6 were 2+, and only 3 were 3_. Similarly, HCC showed a weaker bc1-2 staining pattern compared to PC. Only 1 FA showed grade 1, p53 staining, the remaining 15 were negative, and 15/18 HCA showed p53 expression of varying grades. This difference in p53 staining was statistically significant (p=0.005). A significant p53 overexpression was also seen in HCC compared to PC (p=0.005). In conclusion, there appears to be an inverse relationship between p53 and bc1-2 expression in thyroid follicular neoplasms. A higher expression of p53 and lower levels bc1-2 in Hürthle cell neoplasms may have biological and clinical implications. This may support a more aggressive surgical treatment for HCA compared to FA.
After the demonstration of tumour specific antigens by Foley (1953) and Prehn and Maine (1957) a ... more After the demonstration of tumour specific antigens by Foley (1953) and Prehn and Maine (1957) a great deal of experimental and clinical data have established the role of humoral immunity in various aspects of malignancy. Serum IgA have been studied in 15 cases of carcinoma nasopharynx and a significant increase in IgA levels observed have been correlated with the exposure of the mucosa of oral cavity to environment and its stimulation leading to increased synthesis of the secretary antibody (IgA). No correlation with tumour dissemination was observed. The role of Epstein-Barr virus leading to increase in IgA cannot be ruled out.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc, 1998
Cathepsin B is a lysosomal cysteine proteinase associated with degradation of laminin. It is incr... more Cathepsin B is a lysosomal cysteine proteinase associated with degradation of laminin. It is increased in colorectal carcinoma (CA). Laminin is a major component of basement membrane involved in cell-matrix interactions and tumor progression. The aim of this study was to correlate cathepsin B and tumor-associated laminin in colorectal adenomas (ADs) with increasing grades of dysplasia and in invasive CAs. Forty-five ADs (8 tubular, 16 tubulovillous, 21 villous), 13 adenomas with high-grade dysplasia/carcinoma in situ (AHDs), and 17 invasive CAs were immunostained with polyclonal antibodies to cathepsin B and laminin. Statistical analysis was performed using exact linear by linear association test and Spearman rank correlation coefficient. Cathepsin B-positive tumor cells were seen in 30 (67%) ADs, 13 (100%) AHDs, and 17 (100%) CAs. The grade of cathepsin B staining was significantly increased in AHDs and CAs, compared with ADs (P < .0001). Laminin was continuous in all of the ADs...
Cathepsin B, a lysosomal cysteine proteinase, is associated with degradation of laminin. Its acti... more Cathepsin B, a lysosomal cysteine proteinase, is associated with degradation of laminin. Its activity has been shown to be increased in gastric carcinomas. Laminin is one of the major components of basement membrane involved in cell-matrix interactions and tumor progression. The objectives of this study were to correlate cathepsin B expression in tumor cells with tumor-associated laminin and to further correlate the two with tumor progression. Resected gastric carcinomas (n = 29) taken from the surgical pathology files of the University of Massachusetts Medical Center, Worcester, were immunostained with cathepsin B and laminin using the avidin-biotin complex technique. Statistical analysis was performed using the exact linear by linear association test and exact Kruskal-Wallis test. Kaplan-Meier curves were plotted, and survival analysis was performed using a nonparametric log-rank test. Cathepsin B was expressed in 27 (93%) of 29 tumors (11 weak and 16 strong). Staining of tumor-as...
Solitary fibrous tumor (SFT) is an uncommon spindle cell neoplasm of increasing incidence that wa... more Solitary fibrous tumor (SFT) is an uncommon spindle cell neoplasm of increasing incidence that was originally described to be of pleural origin; however, more recently, SFT has been reported in extrapleural sites, including the orbit, liver, salivary glands, tongue, nose, paranasal sinuses, larynx, retroperitoneum, meninges, and thyroid. The increase in the number of SFTs does not necessarily mean increased incidence of this tumor but rather an increased understanding of this tumor, especially recognition of this tumor in extrapleural locations, which has been aided by immunohistochemical analysis. We report a case of SFT in the auditory canal, which to our knowledge has not been previously reported, as evident by morphologic findings and immunophenotype.
Myelolipomas are rare benign tumors composed of mature fat and hematopoietic elements. They are m... more Myelolipomas are rare benign tumors composed of mature fat and hematopoietic elements. They are most often discovered incidentally within the adrenal glands, with extra-adrenal myelolipomas being extremely rare tumors. We report a case of multifocal omental extra-adrenal myelolipoma in a patient who had undergone bilateral adrenalectomy. To our knowledge, this is the first reported case of an intraperitoneal extra-adrenal myelolipoma.
Pseudoangiomatous stromal hyperplasia (PASH) of the breast is a benign, proliferative mesenchymal... more Pseudoangiomatous stromal hyperplasia (PASH) of the breast is a benign, proliferative mesenchymal lesion with possible hormonal etiology. It typically affects women in the reproductive age group. Pseudoangiomatous stromal hyperplasia is frequently an incidental histologic finding in breast biopsies performed for other benign or malignant lesions. Rarely, it can present as a firm, painless breast mass, which has been referred to as nodular or tumorous PASH. Grossly, tumorous PASH is a well-circumscribed, firm, rubbery mass with solid, homogenous, gray-white cut surface. On histologic examination, it is characterized by the presence of open slitlike spaces in dense collagenous stroma. The spaces are lined by a discontinuous layer of flat, spindle-shaped myofibroblasts with bland nuclei. The spindle cells express progesterone receptors and are positive for vimentin, actin, and CD34. The most important differential diagnosis on histopathology is angiosarcoma. Pseudoangiomatous stromal h...
ABSTRACT The discovery in 1956 that Hashimoto’s thyroiditis is an autoimmune disease spelled the ... more ABSTRACT The discovery in 1956 that Hashimoto’s thyroiditis is an autoimmune disease spelled the end of the concept of horror autotoxicus and introduced the reality of human autoimmunity. Soon after, Graves’ disease was discovered to be directly caused by a serum factor, subsequently identified as an autoantibody. These diseases have served as invaluable models for the understanding of the organ specific autoimmunity. While Graves’ disease and Hashimoto’s thyroiditis are the two most common autoimmune thyroid diseases, autoimmune etiology has been also implicated in other forms of thyroiditides like Riedel’s, postpartum, silent and focal lymphocytic thyroiditis.
Immunohistochemical staining with a novel monoclonal antibody, KiSl, which recognizes a cell cycl... more Immunohistochemical staining with a novel monoclonal antibody, KiSl, which recognizes a cell cycle-associated antigen, was investigated in 142 cases of stage I and II invasive breast carcinoma. KiS 1 staining indices were compared with disease-free interval, overall ...
Infection Control & Hospital Epidemiology, 2007
Our goal was to assess the knowledge, attitudes, and practices regarding infection control and st... more Our goal was to assess the knowledge, attitudes, and practices regarding infection control and standard precautions among a group of nursing and midwifery instructors and students in Iran. A survey questionnaire was completed by 273 nursing and midwifery instructors and students at Shiraz University Medical Sciences during the period from May to November 2002. Two hundred thirty-one (90.9%) of the participants reported that they needed additional infection control education, especially on standard isolation precautions. There was a linear positive correlation between knowledge, practice, and attitude scores for the group of nursing, auxiliary nursing, and midwifery instructors, as well as their students (P < .05). Our study shows that there is an urgent need for evaluating education on infection control practices and standard precautions in general, as well as for structured infection control programs among nursing and midwifery staff.
ABSTRACT Previous studies have established that thyroid follicular neoplasms of higher malignant ... more ABSTRACT Previous studies have established that thyroid follicular neoplasms of higher malignant potential show a high p53 and low bc1-2 expression. This however has not been well studied in Oncocytic (Hürthle cell) neoplasms, the management of which remains controversial. We therefore studied the expression of p53 and bc1-2 in 18 Hürthle cell adenomas (HCA) and 8 Hürthle cell carcinomas (HCC) and compared them with their benign and malignant counterparts, respectively, including 16 follicular adenomas (FA) and 68 papillary carcinomas (PC). All 16 FA were bc1-2 positive, 4 were 2+, and 12 were 3+. On the other hand, 14/18 (78%) HCA showed bc1-2 expression, 5 were 1+, 6 were 2+, and only 3 were 3_. Similarly, HCC showed a weaker bc1-2 staining pattern compared to PC. Only 1 FA showed grade 1, p53 staining, the remaining 15 were negative, and 15/18 HCA showed p53 expression of varying grades. This difference in p53 staining was statistically significant (p=0.005). A significant p53 overexpression was also seen in HCC compared to PC (p=0.005). In conclusion, there appears to be an inverse relationship between p53 and bc1-2 expression in thyroid follicular neoplasms. A higher expression of p53 and lower levels bc1-2 in Hürthle cell neoplasms may have biological and clinical implications. This may support a more aggressive surgical treatment for HCA compared to FA.
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