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Query: UMLS:C0027651 (tumor)
 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Five tumor markers were measured simultaneously in serum by radioimmunoassay: carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP), human chorionic gonadotrophin (HGC), the beta subunit of HCG, and Kappa casein. In a population of 935 normal subjects these antigens were undetectable or found within precise limits. In patients with tumors of various origins the rate of pathologically elevated levels was 72% at the beginning of the clinical course (194 cases). This high rate was primarily due to the simultaneous measurement of CEA, betaHCG, HCG, and casein. AFP was of little importance. The simultaneous measurement of these tumor markers may be one biochemical element of diagnosis of carcinoma, although this criterion is neither absolute nor specific, as 14.7% of patients with non-neoplastic disorders (234 cases) were positive for one antigen. In the presence of metastases (112 cases) the rate of pathologic levels of at least one antigen was increased: 86% due to CEA and casein assay at the same time as their absolute levels were increased. Surgical removal reduces the rate of positivity of these antigens to 37%. As was shown in patients with breast cancer, the rate was 10% when the tumor had been removed at Stage N- and 54% when it was removed at Stage N+. Thus, the persistence of pathologic levels could be correlated with the capacity for recurrence or metastases. Finally chemotherapy, radiotherapy, or both, do not decrease the rate of positivity of the tumor markers.
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PMID:Simultaneous assays of cancer-associated antigens in various neoplastic disorders. 6 15

26 patients all with squamous call carcinoma of the head and neck were treated primarily with Bleomycin (maximal dose 300 mg by i.v. injections of 15 mg every second day). In 10 of the patients a significant regression of the tumor was achieved. In one particular case no histological evidence of tumor could be found. The expected side effects of Bleomycin were observed. Two patients died of heart-lung failure. Histological examinations showed signs of cytostatic pneumopathy.
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PMID:[New experiences with bleomycin]. 6 31

Palliative treatment was applied to 131 cases of unresectable or palliatively resected colorectal carcinoma being monitored with serial CEA determinations. There were 84 instances of disease progression with 67 (80%) of them showing an increase in CEA above pretreatment levels or maintaining high levels, and 17 (20%) showing a fall when compared to pretreatment values or maintaining low initial values. There was a clear-cut regression of the disease in only 9 instances. In all 9, the CEA clearly dropped or maintained low valles throughout the period of regression. No patient in regression had a rise or maintained an elevated CEA level. These changes in CEA followed closely the clinical response of our patient to the use of a particular agent, although for the Nitrosourea compounds there may be a tendency to lower the CEA regardless of the patient's tumor response to the drug. This could be due to the fact that the Nitrosoureas produce a diffuse block of cellular activity, both at the nucleous and cytoplasm; while other compounds act as alkylating agents or by inhibition of enzymes involved in the metabolism of nucleic acids (i.e., 5-FU inhibiting thymidylate synthetase). In general, longer survival was found in those patients who had initially lower levels of CEA as compared to those with high initial levels. The patients with a favorable CEA response to the treatment (falling CEA or maintained low value), even in many who did not show a clinical response had a longer survival than the group with rising or stable high levels. The main value in CEA monitoring of patients resides in its correlation with the amount of disease present and then its ability to detect progression of tumor mass which is not clinically measurable.
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PMID:CEA monitoring of palliative treatment for colorectal carcinoma. 6 32

Three human lung tumor-associated antigens (TAA's) have been identified in soluble and membrane-solubilized extracts of human squamous cell lung carcinoma with the use of antisera raised in rabbits. The antigens were identified and partially characterized by means of an agarose adsorption technique. These antigens, termed lung TAA's 1,2, and 3, are all soluble in 50% ammonium sulfate, are antigenically distinct, and do not cross-react with carcinoembryonic antigen or alpha-fetoprotein. Lung TAA's 1 and 2 are oncofetal antigens demonstrable in soluble extracts from 24-week-old but not from 26-week-old fetal lungs. Rabbit antibodies to these lung TAA's were not adsorbed by types A, B, and O human red blood cells, serum proteins as well as soluble or insoluble lung preparations. Of several commercial antisera to human proteins, none cross-reacted with lung TTA 1, but anti-human liver ferritin cross-reacted with lung TAA 2, and anti-human lactoferrin cross-reacted with lung TAA 3. Lung TAA 1 was partially adsorbed and cross-reacted with certain normal serum or plasma preparations used and appears to be a normal serum protein in Cohn Fraction IV-4. Lung TAA 2 and 3 appear only in lung tumor-soluble extracts, whereas the lung TAA 1 was demonstrable in soluble extracts of breast, colon, cervical and head and neck carcinoma. All may be tumor markers of value in immunodiagnosis.
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PMID:Isolation and identification of human lung tumor-associated antigens. 6 79

Tumor resistance could be induced against the transplantation of cell lines derived from spontaneous lymphomas that occurred in the third of three lymphoma epizootics in a hamster colony. Immunization of normal hamsters with irradiated lymphoma cells promoted resistance to homologous lymphoma challenge and prevented the development of spontaneous lymphomas when immunized hamsters were exposed to the contaminated colony. This immunity could be transferred in an adoptive transfer assay. Resistance to direct challenge was not extended to simian virus 40(SV40)-induced sarcomas carrying SV40 tumor-specific transplantation antigen nor to herpesvirus-induced carcinoma cells, indicating specificity. The nature of the antigen(s) involved was discussed.
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PMID:Characterization of immune responses to spontaneous hamster lymphomas. 6 10

Case reports are given of 37 patients treated between 1964 and 1976 because of carcinoma of the anus, and clinical signs and symptoms, therapy and prognosis are discussed. Most of the patients were 50-70 years old, women being more often afficted then men. Often the carcinoma was misdiagnosed as a benign disease. Hemorrhage and pain were the presenting symptoms in most of the case. Therapy depends upon the localization and the stage of the tumor. Carcinoma localizad distally of the linea dentata were excised locally; infiltrating carcinomas received radiotherapy postoperatively. Abdominal amputation of the rectum was performed if the linea dentata or regional lymph-nodes were involved. Bilateral dissection of inguinal lymph-nodes was performed only if inguinal metastases were suspected. No patients surviving 5 years were observed in the group with lymph-node metastases. On the contrary all patients survived, if carcinoma was localized distally to the linea dentata and had been excised locally. Recurrent malignancy was found only in 3 of these cases. On the basis of these findings it can be concluded that local excision is the therapy of choice in selected cases.
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PMID:[Carcinoma of the anus - clinical signs and symptoms, therapy and prognosis (author's transl)]. 6 37

Determinations of carcinoembryonic antigen (CEA), human chorionic gonadotropin (HCG), and alpha-fetoprotein (AFP) were done by use of frozen serum samples antedating the diagnosis of cancer for 9 pancreatic and 8 gastric carcinoma patients from the Framingham Heart Study. The longest intervals for elevated antigens before cancer diagnosis were 10 months for CEA and 26 months for HCG. (The single elevated AFP was found in a sample 10 days before clinical diagnosis.) Samples from 31 controls matched with the cancer subjects by age, sex, vital capacity, and smoking status showed over 20% "false" positive CEA elevations (all smokers with low vital capacities) and over 20% borderline false positive HCG elevations in postmenopausal females. Although 10-26 months' lead time could infer some potential for use of these tumor-associated antigens to help detect malignant neoplasms at an earlier stage, a serious problem of frequent false positives prevents CEA and HCG levels from being useful as cancer-screening tests at this time.
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PMID:Tumor-associated antigen levels (carcinoembryonic antigen, human chorionic gonadotropin, and alpha-fetoprotein) antedating the diagnosis of cancer in the Framingham study. 6 18

There are many quantitative changes of serum protein and immunoglobulin fractions in patients with cancer of various sites, excluding those with leukemic and lymphoproliferative disorders. The commonest change in serum proteins of patients with neoplastic disease is a reduction in albumin concentration and elevation of alpha globulins, especially alpha-2 fraction. Immunoglobulins (IgG, A,M) are a heterogenous group of proteins contained in the gamma, beta, and alpha-2 electrophoretic fractions of serum proteins. The IgG was found to be significantly increased in patients with cancer of the skin and lung, but decreased in patients with cancer of the prostate and breast. Serum IgM was reported to be elevated in patients with sarcoma, melanoma, brain tumors, but decreased in patients with carcinoma of the ovary. Serum IgA was found to be elevated in patients with cancer of epithelial secretory organs, such as skin, breast, head and neck, lung, gut, prostate, and uterine cervix. Whether these findings reflect specific changes of the humoral arm of tumor-host interaction remains to be investigated.
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PMID:Quantitative change of serum protein and immunoglobulin in patients with solid cancers. 6 75

Electron microscopic, immunologic, and biochemical methods have been used in an attempt to detect and characterize oncornaviruses in human prostatic carcinoma (PCa) and benign prostatic hyperplasia (BPH), and in prostates of mice of high and low mammary cancer or leukemia strains. Ultrastructural examination of 37 PCa and nine BPH specimens has revealed the presence of particles resembling type C virus in five cases of PCa and one of BPH, and also two different types of intracisternal virus-like particles in seven other cases of PCa. Type B virus particles have been observed in prostate of old mice of high mammary cancer strains, while type C virus particles have been found in the prostates of most mice of all the ten strains examined. Immunofluorescence tests with sera from patients with PCa and BPH and with cells derived in vitro from PCa have shown that sera of patients with PCa contained antibodies directed mainly against Forssman-like and tumor-related antigens. In immunofluorescence tests of antisera to major proteins of oncornaviruses with cells of PCa and BPH tissues grown in vitro, positive reactions have been obtained with antisera to p30 protein of murine, feline, and simian type C viruses. Fixed immunofluorescence (FIF) tests of sera of PCa (38%) and BPH (25%) and of some normal donors (27%) gave positive cytoplasmic reaction with mouse prostate cells infected with Soehner-Dmochowski murine sarcoma virus (SD-MSV). Immunoferritin tests of 11 sera positive by FIF gave ferritin labeling of type C virus particles in the SD-MSV-infected mouse prostate cells...
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PMID:Search for oncogenic viruses in human prostate cancer. 6 17

Twenty patients were skin tested with solubilized components of autologous prostatic adenocarcinoma or benign prostatic hypertrophy (BPH). Four of ten patients bearing adenocarcinoma of the prostate exhibited tumor-specific cutaneous responsiveness to solubilized autologous tumor-specific antigens (TSA). One responding patient also responded to solubilized allogeneic TSA. A single patient bearing prostatic carcinoma responded only to solubilized components of allogeneic BPH. Nine of ten patients with BPH exhibited no response to solubilized components of autologous BPH. The patient responding to the extract of autologous BPH, however, also had clinical stage B adenocarcinoma of the prostate. These observations suggest host responsiveness to TSA of prostatic carcinoma. Possible clinical significance and mechanisms to explain the findings are discussed.
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PMID:Tumor-specific immunity in patients with prostatic adenocarcinoma or benign prostatic hyperplasia. 6 25


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