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Biomedical subjects

J Goldman

Publications and source records attributed to J Goldman.

At least 91 records · Page 5Linked to original sources

TSH-Secreting Pituitary Adenoma: Current Management and Review.

The neurosurgical literature contains little information about the current management of patients with thyroid-stimulating hormone (TSH)-secreting pituitary adenomas or about the usefulness of the somatostatin analogue octreotide in such cases. While TSH-secreting pituitary adenomas are rare, our review and illustrative case demonstrate the effectiveness of pretreating patients with octreotide therapy not only to reduce tumor size prior to surgical resection but also to increase the possibility of clinical remission.A 52-year-old male presented with signs and symptoms of hyperthyroidism and elevated TSH, thyroxine, and triiodothyronine. Magnetic resonance imaging revealed a pituitary macroadenoma with extension into the suprasellar cistern. The patient was treated with octreotide for 6 months prior to surgery. Approximately 3 months after initiation of octreotide therapy, the patient exhibited excellent biochemical and clinical response. Tumor shrinkage of nearly 50% was associated with resolution of suprasellar extension and optic nerve compression. Subsequent transsphenoidal surgery for resection of residual adenoma was followed by symptomatic and hormonal remission without the need for reinstitution of octreotide therapy.Pretreatment with octreotide for TSH-secreting pituitary adenomas has a beneficial effect on disease symptoms and reduces tumor mass. We suggest that patients with these rare tumors can be managed with a combination of octreotide therapy and subsequent surgical removal of residual tumor. Although this combination treatment helps to facilitate clinical remission, only short-term follow-up has been reported and thus the optimal management of these patients remains to be determined.

Case Reports↗

Applications of virtual reality technology in pathology.

TelePath(SM) a telerobotic system utilizing virtual microscope concepts based on high quality still digital imaging and aimed at real-time support for surgery by remote diagnosis of frozen sections. Many hospitals and clinics have an application for the remote practice of pathology, particularly in the area of reading frozen sections in support of surgery, commonly called anatomic pathology. The goal is to project the expertise of the pathologist into the remote setting by giving the pathologist access to the microscope slides with an image quality and human interface comparable to what the pathologist would experience at a real rather than a virtual microscope. A working prototype of a virtual microscope has been defined and constructed which has the needed performance in both the image quality and human interface areas for a pathologist to work remotely. This is accomplished through the use of telerobotics and an image quality which provides the virtual microscope the same diagnostic capabilities as a real microscope. The examination of frozen sections is performed a two-dimensional world. The remote pathologist is in a virtual world with the same capabilities as a "real" microscope, but response times may be slower depending on the specific computing and telecommunication environments. The TelePath system has capabilities far beyond a normal biological microscope, such as the ability to create a low power image of the entire sample using multiple images digitally matched together; the ability to digitally retrace a viewing trajectory; and the ability to archive images using CD ROM and other mass storage devices.

Alabama↗

Factors influencing the false positive and negative rates of BCR-ABL fluorescence in situ hybridization.

BCR-ABL fluorescence in situ hybridization has a useful role to play in experimental and clinical investigations of chronic myeloid leukaemia. However, the interpretation of results is complicated by variability in the false positive rate (FPR) and false negative rate (FNR). We therefore examined the effects on FNR and FPR of three factors, namely, the criteria used for defining a fusion signal, nucleus size, and the genomic position of the ABL breakpoint. We established two different criteria for BCR-ABL positivity: by criterion A cells were scored as positive when BCR and ABL signals were overlapping or touching and by criterion B cells were positive if they satisfied criterion A or if the signals were separated by up to one signal diameter. We measured nucleus size and Philadelphia (Ph) positivity in 573 cells from normal persons and 787 cells from the Ph+ SD-1 cell line and related results to FNRs and FPRs. We also assessed the FNR in Ph+ CFU-GM colonies from five patients with different ABL breakpoints. We showed that each of these factors influenced the FNR and FPR. The less strict criterion (B) for Ph positivity increased the FPR but reduced the FNR, the FPR increased as the nucleus size decreased, and the FNR was greatest in CML cells with a 5' ABL breakpoint. We conclude that these factors should be considered when evaluating the results of FISH studies to detect the BCR-ABL fusion gene and that analogous factors may influence results of FISH studies directed at other fusion genes.

Chromosome Breakage↗

Evidence for early B-cell activation preceding the development of Epstein-Barr virus-negative acquired immunodeficiency syndrome-related lymphoma.

To investigate the origin and pathogenesis of acquired immunodeficiency syndrome (AIDS)-related lymphoma (ARL), we studied 14 cases in which Epstein-Barr virus (EBV) infection was not an etiologic factor. By histology, 8 of the specimens were of the small noncleaved cell type and 6 consisted of the large diffuse cell type. Southern analysis using a J(H) probe was consistent with a monoclonal B-cell tumor in 13 cases. To characterize the expressed Ig genes, we performed reverse transcriptase-polymerase chain reaction (RT-PCR) and direct sequencing of PCR products. Eight cases expressed IgM and 1 case expressed IgG. V(H)3 genes were found in 5 cases, V(H)4 genes in 3 cases, V(H)1 genes in 2 cases, and a V(H)7 gene in 1 case. The nucleotide homology to known germline V(H) genes ranged from 80% to 97%, suggesting significant somatic diversification of expressed V(H) genes. The large proportion of V(H)3-expressing lymphomas in this series corresponds to the frequency of V(H)3-expressing B cells in the peripheral blood from healthy and (recent) human immunodeficiency virus (HIV)-seropositve individuals and contrasts with the V(H)3 clonal deficit observed in late stages of HIV infection. Similar to the Ig heavy chain genes, the corresponding Ig light chain genes showed significant deviation from known germline gene sequences. The large proportion of V(H)3-expressing lymphomas as well as the high degree of somatic deviation from germline suggest that these EBV-negative lymphomas might arise from antigen-selected expanded B-cell clones before transformation. Further support for this hypothesis is provided by sequential Ig sequence analysis in 1 patient with large-cell lymphoma. It was shown that 3 years before the diagnosis of axillary lymphoma, there existed several B-cell clones in this patient's bone marrow. One of these clones present in the bone marrow expressed the same rearranged V(H) gene as the axillary lymphoma. Taken together, the current findings from Ig gene analyses suggest that activation of B cells in the early phase of HIV infection may be a predisposing factor for subsequent B-cell transformation.

Amino Acid Sequence↗

Families of adults with mental retardation: stress levels and need for services.

The study described in this article sought to determine whether stress experienced by families of adults with mental retardation was a function of characteristics of caregivers or care recipients, support service needs, and needs for personal care and supervision. Data from interviews with 105 families indicated that the marital status of the caregiver; the level of retardation, frequency of maladaptive behaviors, and health status of the adult family member with mental retardation; and the number and level of services needed were factors in the stress experienced by families. This examination of how perceived stress and needs for services interact provides information essential to developing and funding effective supports to families caring for adults with mental retardation and other developmental disorders.

Adult↗

Brief child assessment battery to assist with treatment planning and program evaluation.

A brief battery of self-report measures was constructed to discriminate effectively 45 matched clinic versus nonclinic subjects, ages 8 to 15. The battery consisted of measures from six domains, including externalizing problems, child and parent report of internalizing problems, peer relations, school functioning, and family relationships. Data on subjects and their families were provided by various sources, including parents, teachers, and the children. In an effort to facilitate interpretation and use of this information by unsophisticated staff, within domain scores were converted to bivariate risk scores. Results indicated effective classification (82%) of groups using the bivariate risk scores alone. This constituted only a small loss of information when the risk scores replaced t-scores. Implications for the use of the risk scores to facilitate treatment planning and program evaluation are discussed.

Adolescent↗

Judicial decision-making in contested custody cases: the influence of reported child abuse, spouse abuse, and parental substance abuse.

This study examined the relationship between allegations of maltreatment and substance abuse, and custody awards in Florida. Information concerning the presence, or absence, of these reports was collected on 60 contested initial disposition, or disposition modification cases, and was used to model judicial decision-making. Substantiated reports of child and spouse abuse occurred very infrequently in our sample. Conversely, substance abuse allegations occurred much more frequently. Judges appeared responsive to allegations of abuse with regard to awards of primary physical residence, despite the lack of substantiated evidence. Maltreatment allegations had no apparent impact, however, on awards of shared, versus sole, custody. Additionally, reports of parental substance abuse also had no apparent impact on judicial decision-making. Implications of these results are discussed.

Adolescent↗

Immunoglobulin gene sequence analysis to further assess B-cell origin of multiple myeloma.

To further characterize the B-cell origin of multiple myeloma, our laboratory performed immunoglobulin gene sequence analyses of four cases of myeloma (three immunoglobulin A and one immunoglobulin G). Three tumors expressed VH3 genes and one expressed a VH1 gene, while the light chains included two V lambda and one V kappa III; one light chain was not isolated. The closest homology to published germ line genes ranged from 91 to 97%. In two cases, the expressed VH genes were compared with the putative germ line precursor VH genes isolated from autologous granulocyte DNA and appeared to have mutated randomly from the germ line gene. By sequencing multiple clonal isolates from each tumor sample, we found no evidence for ongoing mutation in three cases; in one case, however, clonotypic heterogeneity was evident. The analysis of DH- and JH-region genes revealed (i) limited or absent N nucleotide insertions (two of four cases), (ii) the presence of a DH-JH junction resulting from sequence overlap between the DH and JH genes (one of four cases), (iii) the absence of somatic mutations (two of four cases), and (iv) restricted JH gene usage of a JH6 polymorphism (three of four cases). These analyses of DH and JH genes suggest that multiple myeloma, similar to what has been proposed for chronic lymphocytic leukemia, may derive from B cells which have rearranged during fetal development rather than during adult life.

Amino Acid Sequence↗

Estimation of body fat and lean tissue distribution by dual energy X-ray absorptiometry and abdominal body fat evaluation by computed tomography in Cushing's disease.

Body composition determined by dual energy x-ray absorptiometry and the abdominal visceral fat component determined by computed tomographic scanning were examined in women with Cushing's disease and compared with those in obese women with the same anthropometric parameters and those in nonobese women. Patients with Cushing's had no increase in total body fat or the trunk region (android) component, but had a higher intraabdominal fat area compared to the obese subjects. The total lean tissue mass was slightly reduced in Cushing's compared to that in the obese subjects due to a significant decrease in the muscle of the legs and arms; the reduced amounts of fat and lean tissue masses in the arms were the most significant findings in hypercortisolism. The body mineral and bone calcium contents were slightly reduced in Cushing's compared to those in the obese controls. Thus, although obese subjects had more fat and lean tissue and mineral masses than their normal weight counterparts, the Cushing's patients, with the same total fat mass and its components (except in the arms) as obese individuals, present total lean tissue and fractions, including body mineral and bone calcium contents, similar to those in nonobese subjects due to the depletion of the protein depots, as seen in hypercortisolism.

Absorptiometry, Photon↗

Round table discussion 'gene therapy and society'--summary and conclusions.

An international group consisting of scientists, physicians, and one lawyer reported on the problems of gene therapy with regard to society in their respective countries and discussed ethical, legal and scientific aspects of gene therapy. Ethical questions and fear in society were addressed by Dr Odenbach, former Secretary General of the German Medical Association, member of the German Parliamentary Enquiry Commission, 'Prospects and Risks of Gene Technology' and present adviser of the Ethical Committee of the World Medical Association, and by PH Hofschneider, Professor of Virology at the Max-Planck-Institut for Biochemistry, Munich, with a long-time strong interest in medical ethics; legal aspects were addressed by H Hausheer, Professor of Civil Law with many years experience in constitutional law and jurisdiction in Switzerland. Medical and scientific aspects were discussed by R Strohman, Emeritus Professor of Molecular Biology, Berkeley, USA, F Takaku, President of the International Medical Center of Japan and Chairman of the Central Evaluation Committee of the Japanese government for gene therapy, Tokyo and J Goldman, Professor of Leukemia Biology at Hammersmith Hospital, London, and known for this pioneering work in bone marrow transplantation. The discussion was moderated by R Hehlmann, Professor of Medicine at the University of Heidelberg and member of the World Committee of the International Association.

Bioethics↗

Autologous transplants for chronic myelogenous leukaemia: results from eight transplant groups.

Chronic myelogenous leukaemia (CML) can be cured by donor marrow transplant. Unfortunately, suitably HLA-matched related or unrelated donors are not available for the majority of patients. Transplant of stem cells derived from a patient's own marrow or peripheral blood (autologous transplant) avoids the need for an HLA-matched donor, is associated with a less complicated and shorter hospital course than donor transplantation, and has been successful in the treatment of other haematological malignancies. We report results of autologous transplants in 200 patients with CML at eight marrow transplant centres over seven years. This is the first multicentre analysis of autologous transplants for CML and reports on the largest number of patients studied to date. We show that autologous transplants provide a plateau in the survival curve not observed in conventional treatments. Autologous transplants are associated with a high engraftment rate, low mortality, and prompt return of both younger and older patients to normal activity levels. Our results suggest that autologous transplants provide an alternative to conventional treatment in the care of patients not eligible for donor transplant.

Adolescent↗

Autografting for patients with CML in chronic phase: an update. Hammersmith BMT Team LRF Centre for Adult Leukaemia.

Between 1984 and 1992, 21 patients with chronic myeloid leukaemia (CML) in chronic phase (CP) were treated with high-dose chemotherapy (or chemoradiotherapy) followed by autografting with unmanipulated peripheral blood stem cells (PBSC). 12 of these patients survive at a median of 82 months from the time of autografting (range 9-105 months). Nine patients died, six of leukaemia in transformation and three from other causes. Survival of these 21 autograft patients was compared to that of 636 age-matched controls on the Medical Research Council's (MRC) data base, who had been treated with conventional chemotherapy over the same period. Autografted patients had a significantly longer survival at 5 years post autograft than chemotherapy patients (56% v 28%) even after appropriate allowance for time at risk before autograft (Mantel-Byar, 2P = 0.003). There was no difference in survival whether autografting was performed early in the disease or later or whether the PBSC had been harvested soon after diagnosis or later. If the benefits of autografting in chronic phase seen in this non-randomized series can be confirmed in a randomized study, autografting might be the treatment of choice for younger CML patients who do not have suitable donors for allogeneic transplant.

Adult↗

A case-control retrospective study of the efficacy of granulocyte-colony-stimulating factor in children with neuroblastoma.

PURPOSE: We conducted a retrospective case-control study to examine the effect of granulocyte-colony-stimulating factor (G-CSF) on the duration of the neutrophil nadir and other clinical parameters in children with neuroblastoma. PATIENTS AND METHODS: We retrospectively reviewed 85 courses of the same chemotherapy in 16 consecutive neuroblastoma patients. The first nine patients received no growth factor and the following seven patients received G-CSF. Data obtained included days of neutropenia, fever rate and duration, hospitalization rate and duration, antibiotic duration, and infection rate. RESULTS: Patients who received G-CSF had a significant decrease in the period of neutropenia (mean 5.4 +/- 2.6 days per course vs. 11.4 +/- 4.1 days per course in the control group; p < 0.001). There were no statistically significant differences in episodes of fever per course, rate of hospitalization per course, duration of hospitalization, or duration of antibiotic therapy. Control patients had documented infections during 16% (nine of 56) of their chemotherapy courses, whereas the patients receiving G-CSF had infections during 7% (two of 29) of their courses, but this difference was not statistically significant (p = 0.318). We calculated that a study of 220 courses in each group would be needed to have adequate power to confirm that this difference is statistically significant. CONCLUSIONS: The administration of G-CSF in this patient population did result in fewer days of neutropenia, a finding that has been reported previously in several adult studies. However, we conclude that the clinical benefit of more rapid hematologic recovery in children remains uncertain and deserves further investigation in a large, prospective multicenter trial.

Antineoplastic Combined Chemotherapy Protocols↗

Autologous transplantation in chronic myelogenous leukemia: European results: Chronic Leukemia Working Party of the EBMT.

Autologous stem cell transplantation (ASCT) was performed in 95 patients with chronic myelogenous leukemia (CML) in chronic phase and their data were reported to the European Bone Marrow Transplant Registry. Most patients presented bad prognostic factors. The results were analysed by September 1, 1993. The actuarial proportion of patients who achieved a complete hematological response at one year was 87.3+/-7.5% (95% CI). The 3-year percentage of major cytogenetic response was 38.6+/--13% (95% CI). The actuarial risk of transformation for the evaluable patients was 31.5+/-14% (95% CI) and the actuarial survival at four years was 83.3+/-10% (95% CI). These encouraging results suggest that ASCT by itself could play a role to prolong survival in CML patients.

Adolescent↗