Medical Specialties Commons^™

Pressure-Induced Intracellular Signaling In Isolated Arteries, Victor A. Miriel

Theses and Dissertations in Biomedical Sciences

The ability of cells to respond to mechanical stimuli has been studied through a variety of techniques in numerous cell types. The cells of the vascular wall have adapted to specific mechanical stresses through the activation of intracellular signaling pathways which result in cell-specific responses such as hypertrophy, hyperplasia, proliferation, and migration. Vascular smooth muscle of the arteries have been shown to be sensitive to mechanical stimuli such as stretch, and pressure.

This study attempts to add to the current knowledge of mechanotransduction by utilizing the isolated artery preparation. This preparation allows for the study of vascular smooth muscle signal …

Predicting Prognosis In Lung Cancer: Use Of Proliferation Marker, Ki67 Monoclonal Antibody, I N. Soomro, J Holmes, W F. Whimster

Department of Pathology and Laboratory Medicine

An investigation was carried out to assess the prognostic significance of proliferation marker Ki67 in a group of lung cancer patients treated by surgery (limited disease). Tissue was not available for Ki67 immunostaining in inoperable group. The diagnosis is established by bronchial biopsy which does not carry enough tissue for frozen section and counting. This study is supplemented by estimating the prognostic significance of histological sub-types in the operable group and in a group of inoperable patients with extensive disease. These are usually treated by radiotherapy and/or chemotherapy. In all, 267 patients were studied including 105 treated by surgery. These …

Reflections: Historical Perspectives On Pathology In Houston And Galveston, Ellen B. Koch

Texas Medical History E-Books

“This account of pathology in the Houston and Galveston area … examines important themes in the development of pathology in this area, using selected details from the careers of individuals and institutions to illustrate how pathologists, as practitioners, teachers, and researchers, dealt with the challenges they faced in finding and keeping a niche for pathology in the medical world.” - Preface

This book was written to commemorate the 50^th anniversary of Houston Society of Clinical Pathologists. Bibliographic references and other resources are included.

Role Of Serum Angiotensin Converting Enzyme In Sarcoidosis, Aysha Habib, Farooq Ghani, Mohammad Khurshid, Amanullah Khan, M. Atta Khan

Department of Pathology and Laboratory Medicine

This study was conducted to determine the role of Serum Angiotensin Converting Enzyme (SACE) as a marker in the differential diagnosis of pulmonary diseases and prognosis of sarcoidosis, A retrospective analysis of 113 medical records of patients at The Aga Khan University Hospital, with laboratory investigation for SACE was performed. Among 113 patients, 51 cases were found to have sarcoidosis, 44 of them had SACE levels greater than 52 lU/L (mean ACE 104.44). SACE levels were also found elevated in other clinical conditions like tuberculosis (mean 58.64 lUlL), but the enzyme level were less (p0.04) than those found in sarcoidosis …

Diagnostic Evaluation Of Fine Needle Aspiration Cytology In The Management Of Palpable Breast Lesions, S. H. Shah, Naila Kayani, S. H. Hasan, I. N. Soomro, Shahid Pervez, A. S. Hussainy

Department of Pathology and Laboratory Medicine

A total of 113 fine needle aspirates of the breast masses were evaluated in which the subsequent biopsy or mastectomy specimen were also available for histological examination. The age ranged from 16 to 80 years with a mean of 42 years. In benign conditions the mean age was 34.7 years while in malignant cases it was 48 years. The cytological diagnoses were compared with the histological results which revealed that the specificity and sensitivity of fine needle aspiration cytology in the palpable breast lesions was 86.1% and 89.2% respectively with a positive predictive value of 93% and efficiency of 88.2%. …

Ossifying Fibroma Of Nasal Cavity, Abbas Zafar Abbas Zafar, Muhammad Shafi Muhammad Shafi, Shaukat Malik Shaukat Malik, Shahid Pervez

Department of Pathology and Laboratory Medicine

No abstract provided.

Mucinous Cystadenoma Of The Urinary Bladder, I N. Soomro, A T. Rashid

Department of Pathology and Laboratory Medicine

No abstract provided.

Oral Cancer Screening, Damon Omar Watson

Honors Theses

Cancers of the oral cavity and pharynx have increased throughout the decades. Since oral cancer represents a small percentage of the total cancers in the United States, it is often overlooked. Though this is the case, the results of this cancer can be devastating. To address this issue, an Oral Cancer Screening was organized on August 14, 1996 at the West Michigan Cancer Center in Kalamazoo. This was a joint collaboration between the author, the West Michigan Cancer Center, and the Kalamazoo Valley Dental Society. This event allowed research to take place concerning the data obtained. Confidential results and information …

Molecular And Cellular Biology Of Prostate Cancer, El-Nasir Lalani, Marc Elie Laniado, Paul David Abel

Department of Pathology and Laboratory Medicine

Prostate cancer is an enigmatic disease. Although prostatic-intraepithelial neoplasia appears as early as the third decade and as many as 80% of 80 year old men have epithelial cells in their prostate that fit the morphological criteria for cancer, only about 10% of men will ever have the clinical disease and less than 3% will die from it. There have been no significant proven interventions which have altered the natural history of the disease since hormone down regulation was introduced in the 1940s and new research has been poorly supported. There is however an urgent need to develop new criteria …

Classification And Immunophenotyping Of Acute Leukemias: A Prospective Study., Shahid Pervez, M. Khurshid

Department of Pathology and Laboratory Medicine

Over a period of 3-1/2 years, 86 cases of acute leukemia were analyzed by immunohistochemical (IHC) means on ficoll separated cytospin preparations of peripheral blood and/or bone marrow samples. Antibodies included in the panel were specific against Tdt, HLA-DR, CD19/CD2O/CD22, CALLA (CD1O), CD2, CD11C as well as against Ig heavy chains. Of 86 cases analyzed, 48 cases were of ALL, (25 of common pre-B ALL, 15 of pre-B/NULL and 8 of T ALL phenotype), twenty-four (24) out of 86 cases were of non­lymphoblastic (AML/AMML) type. In six cases, there was suggestion of a mixed lineage, while in 8 cases there …

Immunophenotypic Analysis Of Non-Hodgkin's Lymphoma, Suhail Muzaffar, Shahid Pervez, Farrukh Aijaz, Syed Abdul Aziz, Sheema H. Hasan

Department of Pathology and Laboratory Medicine

One hundred and three cases of Non-Hodgkin’s lymphoma were evaluated immunohistochemically using a panel of monoclonal antibodies which includes leucocyte common antigen (LCA), CD45R (Pan-B marker), L-26 (CD 20-Pan-B marker) and UCHL-1 (Pan-T marker). Of the total 63 cases (61.17%) showed a B-cell phenotype while 40(38.83%) were of T-cell origin. Most B-cell neoplasms belonged to intermediate (79.36%) or high grade (15.87%) according to the international Working Formulation (WF). Most T- cell lymphomas were of either intermediate (52.5%) or high grade (32.5%) neoplasms. Some T-cell neoplasms presented as specific clinicopathological entities like lymphomatoid granulomatosis (2 cases), mycosis fungoides (1 case) and …

Social And Cultural Factors Affecting Rates Of Regular Retreatment Of Mosquito Nets With Insecticide In Bagamoyo District, Tanzania, P.J. Winch, A.M. Makemba, V.R. Makame, M.S. Mfaume, M.C. Lynch, Zul Premji, J.N. Minjas, C.J. Shiff

Pathology, East Africa

Insecticide-treated mosquito nets have an impact on mortality and morbidity in young children under controlled conditions. When integrated into larger control programs, there is the danger that rates of regular retreatment of the nets with insecticide will drop, greatly limiting their effectiveness as a public health intervention. In Bagamoyo District, Tanzania, rates of retreatment dropped significantly when payment for the insecticide was introduced. A series of neighbourhood (hamlet) meetings were held in all study villages to discuss people's concerns about the insecticide and ways to increase rates of retreatment. Although changes were made in the procedure for retreatment, rates of …

Mosques Against Malaria, M.S. Mfaume, P.J. Winch, A.M. Makemba, Zul Premji

Pathology, East Africa

In a community-based malaria control project covering a predominantly Muslim population in the United Republic of Tanzania, difficulty was encountered in motivating people to have their mosquito nets reimpregnated with insecticide at six-monthly intervals. Education on this subject was therefore provided in mosques during Friday noon prayers. People who attended these services considered them an appropriate forum for discussing health concerns and viewed them as a credible source of information.Insecticide-impregnated bednets help to control the spread of the malaria parasite Plasmodium falciparum. The Bagamoyo Bednet Project is a community-based scheme to develop a sustainable system for the distribution and promotion …

Parotid Gland Lipoma: A Rare Entity, S Muzaffar, N Kayani, S H. Hasan

Department of Pathology and Laboratory Medicine

No abstract provided.

Resistance Of Blastocystis Hominis Cysts To Chlorine, M Zaki, V Zaman, N A. Sheikh

Department of Pathology and Laboratory Medicine

No abstract provided.

Subcutaneous Phaeohyphomycosis: Infection With Pigmented Fungi, I N. Soomro, A Kennedy

Department of Pathology and Laboratory Medicine

No abstract provided.

Neuronal Toxicity Of Humoral Factors From Patients With Diabetic Neuropathy And Mechanism Of Neuronal Death On Cultured Adrenergic Neurons: Studies Of Autoimmune Pathogenesis In Diabetic Neuropathy, Dong Liu

Theses and Dissertations in Biomedical Sciences

Diabetic neuropathy is an extremely common medical problem because of the high frequency of diabetes and its complications. Diabetic neuropathy consists of not one, but many patterns of nerve injury, each potentially with its own discrete pathogenic mechanisms. Evidence is accumulating that indicates autoimmunity plays a role in diabetic peripheral neuropathy. However, the significance of immunopathogenesis of diabetic neuropathy is as yet unclear.

Using the N1E-115 mouse neuroblastoma cell line (NB) as a model of the adrenergic autonomic neuron, we found that sera of IDDM patients with neuropathy inhibit growth and differentiation of adrenergic neurons in culture (Pittenger et al, …

Churg-Strauss Syndrome With Intestinal Perforation, Javaid A. Khan, Imran Hassan, Shahid Pervez, Wasim Jafri, Shaista Khan

Department of Pathology and Laboratory Medicine

No abstract provided.

Analysis Of The Effects Of Overexpression Of Metallothionein-I In Transgenic Mice On The Reproductive Toxicology Of Cadmium., T Dalton, Kai Fu, G C Enders, R D Palmiter, G K Andrews

Journal Articles: Pathology and Microbiology

Exposure to low levels of cadmium reduces fertility. In male mice spermatogenesis is highly sensitive to cadmium, whereas in females the peri-implantation period of pregnancy is sensitive. To examine the potential roles of the cadmium-binding protein, metallothionein (MT), in the reproductive toxicology of cadmium, we examined a transgenic mouse strain that overexpresses metallothionein-I (MT-I). These mice had dramatically increased steady-state levels of MT-I mRNA and MT in the testes and in the female reproductive tract during the peri-implantation period of pregnancy, and this overexpression occurred in a cell-specific and temporally regulated manner similar to that of the endogenous MT-I gene. …

Localized Tuberculosis And Myelofibrosis With Myeloid Metaplasia : An Extremely Unusual Presentation, Suhail Muzaffar

Department of Pathology and Laboratory Medicine

Myelofibrosis with myeloid metaplasia (MMM) is usually considered primary agnogenic, however, it may be secondary to various diseases, The association of tuberculosis with MMIM is exceedingly rare, however, the pathogenetic relationship between the two is difficult to define. We present a case report showing simultaneous presentation of localized active tuberculosis and MMM The literature on the subject is also reviewed with special emphasis on pathogenic relation­ship between the two.

Treatment Practices For Degedege, A Locally Recognized Febrile Illness, And Implications For Strategies To Decrease Mortality From Severe Malaria In Bagamoyo District, Tanzania, A.M. Makemba, P.J. Winch, V.M. Makame, G.L. Mehl, Zul Premji, J.N. Minjas, C.J. Shiff

Pathology, East Africa

Malaria remains one of the chief causes of mortality among young children in sub-Saharan Africa. Verbal autopsies for cases of childhood mortality in Bagamoyo District, Tanzania demonstrated that degedege, a locally defined illness of children characterized by fever and convulsions, is frequently treated by traditional healers. To investigate this further, an ethnographic study was carried out in one village that included in-depth interviews with 14 traditional healers and 3 focus groups with parents. Parents and traditional healers were unanimous in their conviction that degedege requires traditional treatments, at least initially, and that these treatments are effective. While traditional healers do …

Selective Increases In Antibody Isotypes And Immunoglobulin G Subclass Responses To Secreted Antigens In Tuberculosis Patients And Healthy Household Contacts Of The Patients, R Hussain, G Dawood, N Abrar, Z Toossi, A Minai, M Dojki, J J. Ellner

Department of Pathology and Laboratory Medicine

Mycobacterium tuberculosis-specific antibodies (immunoglobulin M [IgM], IgE, IgG, and IgG subclasses) were determined in 164 tuberculosis patients (pulmonary involvement, n = 135; lymph node involvement, n = 29), 59 healthy household contacts (HC), and 51 healthy endemic donors (EC) by a quantitative enzyme-linked immunosorbent assay for reactivity with culture filtrate. Among the isotypes, significant differences between tuberculosis patient groups with either pulmonary or lymph node involvement and healthy control groups (HC and EC) were detected only for IgG (P < 0.001) and IgG1 (P < 0.001) antibodies. Pulmonary patients also showed a significant difference with IgM (P < 0.01) and IgE (P < 0.05) antibodies. HC showed elevation of only IgM antibodies compared with EC, indicating that IgM antibodies may be an indicator of recent infection with M. tuberculosis. These results suggest that the switching of IgM antibody response to IgG1 is a critical event in disease progression. Polyclonal IgG1, IgG3, and IgE antibodies also showed significant elevation (P < 0.05) in patients compared with EC. A strong correlation (rho = 0.254; P < 0.003) was observed between M. tuberculosis-specific IgG1 and polyclonal IgG1 in patients, suggesting that activations of antigen-specific and polyclonal antibodies are related events. No correlation was found between IgG1 antibodies and purified protein derivative skin test results. Since IgG1 antibody responses to culture filtrate are present only after disease establishment, IgG1 responses could provide a useful diagnostic marker of disease.

Primary Amyloidosis Of Gut Presenting With Dysphagia, Zaigham Abbas, Shahab Abid, Naim -Ur- Rehman, Shahid Pervez

Department of Pathology and Laboratory Medicine

No abstract provided.

A 55 Year Old Diabetic Presenting With A Rash And Polyneuropathy, S Hyder, H Rasool, H Naqvi, Naila Kayani

Department of Pathology and Laboratory Medicine

No abstract provided.

A Model Of Cytomegalovirus Association With The Development Of Heart Graft Atherosclerosis, Evan Skowronski

Loma Linda University Electronic Theses, Dissertations & Projects

The development of graft atherosclerosis in heart transplant recipients has been associated with the development of post-transplant cytomegalovirus infection. The mechanism of this involvement, however, remains unclear. I undertook a study to determine the role of cytomegalovirus in the development of graft atherosclerosis. First, a rapid method of detecting cytomegalovirus based on capillary polymerase chain reaction and gel electrophoresis was employed to determine the presence of cytomegalovirus in a wide variety of clinical samples. Detection of cytomegalovirus is a lengthy procedure under normal conditions, and timely detection of cytomegalovirus in transplant recipients may allow intervention early enough to block the …

Moraxella (Branhamella) Catarrhalis: A Molecular Epidemiology Study, Lyndell R. Gill

Electronic Theses and Dissertations

Moraxella (Branhamella) catarrhalis is the third-most-frequently isolated microorganism associated with acute exacerbations of chronic bronchitis in patients during their stay at the Mountain Home VA Medical Center (MHVAMC). In order to develop a practical, epidemiologically-meaningful typing method for M. (B.) catarrhalis, we tested two methods based on analysis of chromosomal DNA for typeability, reproducibility, and ability to differentiate between unrelated strains (discriminatory power, D). M. (B.) catarrhalis isolants from MHVAMC from 7/1/87-6/30/88 were grown overnight in broth and embedded in agarose. DNA was isolated by standard methods. The DNA was subjected to: (1) restriction endonuclease digestion (with either Bgl II …

Indomethacin Reduces Splenic Red Pulp Macrophage Populations In Female New Zealand White Rabbits, Thane S. Thurmond

Electronic Theses and Dissertations

In an effort to elucidate the mechanism by which indomethacin (IN) attenuates the stimulatory effect of estradiol (E$\sb2$) on rabbit splenic red pulp macrophages (RPM), thirty-nine female New Zealand White rabbits were divided into 10 groups: ovariectomized (OVX), OVX/IN at 0.1 and 5.0 mg/kg body weight (bw)/day; sham OVX (SOVX), SOVX/IN at 0.1 and 5.0 mg/kg bw/day; OVX/25 mg E2, OVX/25 mg E$\sb2$/IN at 0.1 and 5.0 mg/kg bw/day; intact Control. Quantitative changes in RPM population in response to the treatments were measured using a 0 to 4 histologic grading scale. Estradiol treatment resulted in increased RPM grade when compared …

Microwave Oven--Not Only For Cooking, S Pervez

Department of Pathology and Laboratory Medicine

No abstract provided.

Case Of Pelvic Relapse In A Child Suffering From Acute Lymphoblastic Leukemia, Karim Qamruddin, Sheema Hasan, Mohammad Khurshid

Department of Pathology and Laboratory Medicine

We describe here a case of an eight years old child suffering from acute lymphoblastic leukemia. She developed pelvic infiltration of leukemic cells while in bone marrow remission and receiving maintenance chemotherapy: She also developed leukemic infiltration of Central Nervous System and died of complications resulting from massive pelvic relapse. With greater number of children in bone marrow and CNS remission, the issue ofpossible greater predisposition to extramedullary relapse has been discussed. The need for greater vigilance towards pelvic surveillance has been stressed.

Diagnosis Of Genetic Defects By Chromosomal Analysis, Farooq Ghani, Siddiqua Maniac, Zahida Khilji, Mohammad Azim, Mohammad Khurshid

Department of Pathology and Laboratory Medicine

Of 901 karyotypes performed over a period of 4 years, genetic anomalies were detected in 162 cases. Down’s syndrome (trisomy 21) was the most common (168.8%) genetic disorder followed by Turner’s syndrome, Philadelphia chromosome, Klinefelter's syndrome, Edward’s syndrome (trisomy 18) and Patau’s syn­drome (trisomy 13). All the three trisomies were detected very early in life. Mean age at the time of diagnosis for Turner’s syndrome was 13.3 years, allowing a timely hormone replacement therapy to improve secondary sexual characters. Patients with Klinefelter's syndrome were diagnosed late (mean age 23.6 years), which greatly reduced their chances of an effective therapy to …