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Biomedical subjects

B Anderson

Publications and source records attributed to B Anderson.

At least 325 records · Page 18Linked to original sources

The effects of symptoms and delay in seeking diagnosis on stage of disease at diagnosis among women with cancers of the ovary.

This study evaluated characteristics of symptoms, their perceived cause, and delay in seeking a diagnosis associated with stage, grade, and histologic features of disease at diagnosis among incident cancer cases of the ovary (N = 83) identified in the Iowa National Cancer Institute-Surveillance, Epidemiology, and End Results population-based cancer registry. Contrary to clinical impressions, most early-stage cancers produced symptoms and were more likely than late-stage cancers to cause fatigue and urination problems; however, only irregular menstrual cycles were more likely to convince these patients with early-stage cancers to seek a diagnosis. Late-stage cases were most often accompanied by abdominal pain and swelling, but only pain was likely to convince women to seek a diagnosis. There was no association between delay, perceived cause, or seriousness of symptoms with stage of disease at diagnosis. Women, particularly those with a medical history of high risk factors, should be made aware that apparently benign disease symptoms are characteristic of early ovarian cancer and that this tumor can be found early if they seek medical attention immediately.

Abdomen↗

Cerebral amyloid angiopathy associated with massive intracerebral hemorrhage.

Characteristic computed tomographic, clinical and pathologic features are discussed in two patients with cerebral amyloid angiopathy (CAA) associated with massive intracerebral hemorrhage. Amyloid angiopathy should be considered in any elderly patient in whom intracerebral hemorrhage occurs at an atypical site. Cortical involvement, multiplicity of hemorrhages, bilaterality, and repeated episodes should further arouse diagnostic suspicion. Clinical management is confined to prevention of systemic hypertension.

Aged↗

Vulvar lymphangioma circumscriptum: a rare complication of therapy for squamous cell carcinoma of the cervix.

The clinical and pathological features of a case of multifocal lymphangioma circumscriptum of the vulva are reported in a patient with chronic lymphedema of a lower extremity. Ten years previously the patient had been treated for squamous cell carcinoma of the cervix. Although lymphangioma circumscriptum is an extremely rare complication of altered lymphatic drainage, the presence of multiple noninflammatory vesicular appearing lesions in this setting should suggest the correct diagnosis.

Carcinoma, Squamous Cell↗

Caution: leases can hide dangerous curves and clauses.

Leasing medical equipment can be a financially advantageous undertaking, but also somewhat risky. Leases, if misrepresented by the leasing company, can trap the healthcare organization into an agreement that is actually more costly than purchasing the equipment. Therefore, extreme caution should be taken when evaluating leasing agreements, looking carefully at each individual section of the lease for possible "hooks" and misrepresentations.

Contract Services↗

Preparation and characterization of antibodies with specificity for the amino-terminal tetrapeptide sequence of the platelet-derived connective tissue activating peptide-III.

Antisera selectively reactive with the N-terminal tetrapeptide sequence of the platelet-derived connective tissue activating peptide-III mitogen were prepared and characterized. Solid phase synthesized Z-Asn-Leu-Ala-Lys(Z)-OH tetrapeptide representing the N-terminus of the mitogen was used as an immunogen after carbodiimide mediated coupling to methylated bovine serum albumin carrier and subsequent removal of Z groups. Anti-tetrapeptide sera demonstrated cross-reactivity to the mitogen but not beta-thromboglobulin, fibroblast growth factor, or epidermal growth factor, and a limited cross-reactivity to parathyroid hormone. The studies indicate that the N-terminal sequence of the mitogen is accessible for binding with antibody and the antitetrapeptide sera provide a reagent for the selective measurement of biologically active mitogen in the presence of structurally similar beta-thrombo-globulin. In addition, computer analysis of amino acid sequences revealed that few proteins contain the Asn-Leu-Ala-Lys sequence and of those that do, many are retroviral proteins or transforming polyproteins.

Amino Acid Sequence↗

Antisera specificities to beta-D-galactopyranoside cluster ligands.

Mono-, di-, and tri-beta-D-galactopyranosides of 2-(5-hydrazinocarbonylpentanamido)-2-(hydroxymethyl)-1,3-propan edi ol [(Gal)n-TA] have been conjugated to bovine serum albumin (BSA), and used to study the binding specificities to the Gal receptors of liver parenchymal cells. In this study, rabbit antisera produced to the (Gal)n-TA-BSA were characterized by using an enzyme-linked, immunosorbent assay under conditions that allow only the antibodies directed to the carbohydrate part of the antigen to react with the solid-phase (Gal)n-TA-BSA antigens. Inhibition assays using (Gal)n-TA-BSA conjugates showed a relative specificity of the antisera for the number of Gal residues on the TA bridging group to the BSA carrier-protein, indicating that antibodies having specificities to oligosaccharide branch points can be produced. Inhibition assays with (Gal)n-TA haptens, Gal, and methyl beta-D-Gal indicated that the antibody combining-sites interact mainly with the Gal units; no inhibition was observed with the TA bridging group used as a hapten inhibitor. The spatial distances of the Gal units were apparently important for interaction with the anti-(Gal)n-TA-BSA antibody-combining-sites, as (Lac)3-TA-BSA and (Lac)3-TA exhibited relatively little inhibitory activity.

Animals↗

Structures of oligosaccharides cleaved by base-borohydride from an I, H and Lea active ovarian cyst glycoprotein.

Oligosaccharides were cleaved by base-borohydride from an I, H and Lea active ovarian cyst glycoprotein and purified by Bio-Gel P-6 and paper chromatography. The structures of five oligosaccharides, determined by compositional analyses, quantitative periodate oxidation, chronic acid oxidation, methylation analyses and enzymatic degradations, were as follows: oligosaccharide I, beta DGal1----3DGalNAc-ol; II, beta DGal1----4 beta DGlcNAc1----6(beta DGal1----3)DGalNAc-ol; III, alpha LFuc1----2 beta DGal1----4 beta DGlcNAc1----6(beta DGal1----3)DGalNAc-ol; IV, beta DGal1----3(alpha LFuc1----4)beta DGlcNAc1----3beta DGal1----4 beta DGlcNAc1----6(beta DGal1----3)DGal1NAcol; and V, beta DGal1----3(alpha LFuc1----4)beta DGlcNAc1----3 beta DGal1----4 beta DGlcNAc1----6[beta DGal1----3(alpha LFuc1----4)beta DGlcNAc1----3 beta DGal1----3 beta DGal1----3]DGalNAc-ol. Of the oligosaccharides 60% had a molecular size of a decasaccharide or smaller, the tetra- and pentasaccharides II and III predominating. Oligosaccharides I through IV have been previously isolated from several glycoproteins by other laboratories; the decasaccharide, V, is a new structure.

ABO Blood-Group System↗

Colostomy irrigation with prostaglandin E2 and bisacodyl. A double-blind cross-over study.

The emptying of the colon and the side-effects after intraluminal application of prostaglandin E2 and of bisacodyl in 14 patients was studied by employing colostomy irrigation. The design was double-blind with cross-over, the irrigation was one litre of tap water to which was added in randomized sequence placebo, prostaglandin *2 (350, 700 and 1400 micrograms) or bisacodyl (1.25, 2.5 and 5 mg). Neither prostaglandin E2 nor bisacodyl had any significant effect.

Adult↗

Serum cold agglutinin and IgM levels in breast carcinoma.

Breast carcinoma (BCa) cells produce I antigen or I antigen-like substances that may influence serum anti-I. We determined cold hemagglutinins in 170 BCa patients, 97 women with benign breast disease, and 37 female controls of comparable ages to the patients. The results were expressed as an anti-I score. Serum IgM was measured by radial immunodiffusion. The data for the BCa patients were analyzed by pathologic stage (PS) and histologic category. The anti-I score for PS III (28.1 +/- 13.0; mean +/- S.D.) was higher (p less than 0.02), and that for PS IV (11.4 +/- 7.4) lower (p less than 0.02) than the control value (17.7 +/- 10.2). IgM concentrations of the BCa patients as a group or by PS were similar to those of the controls. The mean anti-I scores were higher in mucinous (31.1 +/- 14.9, p less than 0.001) and apocrine BCa (28.6 +/- 16.2, p less than 0.02) compared to the control value. IgM concentrations were elevated in mucinous (218.1 +/- 85.8 mg/dl, p less than 0.01) and apocrine BCa (241.9 +/- 99.0, p less than 0.005) compared to the control value (157.1 +/- 66.9). The results suggest an association of anti-I scores and PS of BCa and suggest an antigenic difference of mucinous and apocrine from infiltrative ductal BCa.

Adenocarcinoma↗

Anxiety and cancer treatment: response to stressful radiotherapy.

Previous research with individuals undergoing surgery or diagnostic procedures provided a conceptual framework for analysis of radiation therapy, a common form of cancer treatment. The present investigation was designed to document the magnitude of anxiety patients experience in response to one particularly stressful form of radiation treatment. In addition, the change in anxiety responses with repeated exposures and individual differences among patients that may affect their adjustment were explored. In Part 1, gynecologic cancer patients receiving their first internal radiotherapy application were studied. As the time for treatment neared, subjective and physiologic indicants of anxiety and distress among the patients significantly increased. By 24 hours post-treatment, anxiety for all patients remained elevated. These post-treatment data are convergent with other investigations of post-treatment distress among cancer patients, but contrast with data obtained from those receiving treatment for benign conditions. A subset of the women who required two applications of radiotherapy participated in Part 2. These patients continued to respond negatively during the second treatment. Data on individual differences in anxiety responses (i.e., low vs. high anxiety) were obtained in both investigations and suggest that those with low levels of pre-treatment anxiety experience considerable disruption post-treatment.

Adult↗

Treatment of squamous carcinoma of the retromolar trigone.

Since squamous carcinoma of the retromolar trigone is unusual, there is a paucity of information in the world's literature to use as a reference for selecting treatment and determining pertinent factors affecting prognosis. Consequently, an analysis of the medical records of 110 patients with biopsy proven squamous carcinoma originating in the retromolar trigone, seen and treated entirely at The University of Texas M.D. Anderson Hospital and Tumor Institute at Houston from 1965-1977, with at least 5 years of follow-up, was completed and constitutes the substance of this study. Local-regional control and survival were correlated with age, sex, presenting signs and symptoms, dental status, T and N classification, histologic grading, surgical findings, and the various modalities of treatment. Seventy lesions were staged T1-T2 and 77 patients had N0 necks. Thirty-five patients received a planned combination of surgery and x-ray therapy to the primary and/or neck. A composite resection was performed in 48 patients with the closure accomplished primarily or with a skin graft. The various surgical approaches are critiqued with a favorable emphasis on the marginal resection of the mandible and a modification of the radical neck dissection. The ultimate failure in the primary and the neck was 7% (8/110) and 10% (11/110) respectively. Single modality treatment whether it is surgery or irradiation appears equally adequate regardless of the T or N Stage. However, more T3-T4 cancers were treated initially with surgery. Thirty-six patients developed a second primary cancer of which 29 were in the upper aerodigestive tract. The low 5-year survival of 20% (29/110) reflects a poor salvage of the second primary and a high incidence of intercurrent disease in this elderly group of patients.

Adult↗

Effect of ABO group, secretor status and sex on cold hemagglutinins in normal adults.

The ABO group, Lewis type and secretor status were determined in 546 normal individuals (241 male, 305 female). Their serum was tested at 4 degrees C for agglutination of group O red blood cells; the antibody was presumed to be auto-anti-I; the results were expressed as a score. Among non-A female donors, the score was higher for secretors than nonsecretors (p less than 0.05). Among non-A secretors of both sexes, female donors had a higher score than male donors (p less than 0.05). These results suggest that the level of anti-I in the serum of normal individuals may be affected by the donor's ABO group, secretor status and sex.

ABO Blood-Group System↗

Common beta-lactamase-specifying plasmid in Haemophilus ducreyi and Neisseria gonorrhoeae.

Eighty-nine strains of Haemophilus ducreyi from a chancroid epidemic in Orange County, California, were examined for plasmid content. Seventy-eight (88%) of these isolates were found to contain a plasmid of 3.2 megadaltons which conferred beta-lactamase production. Restriction endonuclease digests indicated that this was the same plasmid that was found in some strains of beta-lactamase-producing Neisseria gonorrhoeae.

DNA, Bacterial↗