Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0027627 (metastases)
 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Mutational changes in the p53 tumor suppressor gene are the most frequent genetic alterations in human malignant tumors. Studies have shown a correlation of p53 expression in breast cancer with tumor prognosis. In contrast to mutational activation of ras and GSP in thyroid tumors, little is known about the role of p53 in thyroid tumor development. Therefore thyroid tumors and thyroid tumor cell lines were studied for the presence of p53 mutations. Snap-frozen tissues from 57 differentiated thyroid carcinomas (DTCs) and 5 goiters were studied by immunohistochemical methods. A panel of six antibodies (pAb 240, 421, 1620, 1801, DO7, and CM1) was employed by using the ABC technique. Five cell lines from DTCs (FTC133, 236, 238, PTC337, MTC164) were examined by the same technique. Additionally, genomic DNA from the cells was amplified by the polymerase chain reaction (PCR) and the PCR product studied for p53 mutations (R273H) by mutation-specific oligonucleotide hybridization (MOH) and temperature gradient gel electrophoresis (TGGE) for the p53 exon 8. None of the benign thyroid tumors and 7 of 57 (12%) DTCs strongly express p53 with a heterogeneous distribution in the tumor tissue. All seven patients have metastatic disease or dedifferentiated tumors G3 (three of seven). CM1 was positive in two cell lines (FTC-133, PTC-337), questionable in FTC-238, and negative in FTC-236 and MTC-164. All three follicular cell lines, however, and the original tumor tissue showed the same p53 mutation (R273H) in MOH analysis and TGGE. P53 mutations are rare in thyroid tumors, but the presence of p53 mutations indicates a poor prognosis.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Significance of P53 in human thyroid tumors. 772 41

Data from 110 Chinese patients presenting with papillary thyroid cancer to a single institution up to December 1985 have been analyzed to evaluate the possible risk factors affecting survival. There were 83 women and 27 men with an age range of 15 to 78 years (mean 45 years, median 42 years). The longest follow-up period is 39 years and the median 10 years. Cervical lymph node recurrence more than 6 months after surgery developed in 12 patients, of whom 1 died with a concomitant distant metastasis. "Thyroid bed" tumor recurrence, after apparently complete surgery, presented in 10 patients and resulted in 5 deaths. Distant metastases were identified in 17 patients with 7 deaths. Another 4 patients died from advanced local disease incompletely resectable on presentation. The following seven risk factors for survival were selected for multivariate analysis: age, sex, tumor size, histologic evidence of extrathyroidal spread, lymph node recurrence, neck recurrence, and distant metastases. Age, size, neck recurrence, and distant metastases were all significant on univariate analysis. Using Cox proportional hazards regression in the multivariate analysis of these seven factors, only age (p < 0.0001) was shown to be significant. Age over 40 years on first diagnosis was a highly significant indicator of high risk (p = 0.0003, log-rank).
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PMID:Multivariate analysis of risk factors influencing survival in 110 ethnic Chinese with papillary thyroid cancer. 772 43

We studied the records of 342 patients with papillary thyroid carcinoma out of a total of 728 thyroid cancer patients treated at the Medical School of Hannover (MHH) from 1972 through 1992. The comprehensive data-abstracting forms were designed, and the acquired information was coded, stored, maintained, and evaluated by the Clinical Cancer Registry of the MHH. A total of 160 patients (46.8%) initially had lymph node metastases (N1 status). The N status significantly influenced recurrence (p < 0.00001) and survival (p < 0.00001). Excluding other risk factors developed by univariate and multivariate analysis, such as high age (age > 45 years, p < 0.001), tumor invasion (T4 tumor, p < 0.005), and distant metastases (M1, p < 0.001), lymph node metastases remained an independent, highly significant prognostic marker for more aggressive papillary thyroid cancer. N1 status did not influence survival of patients with T4 tumor but did influence those with T1-T3 status (p < 0.001). The influence of N1 status remained significant in patients older (p < 0.001) and younger (p < 0.05) than 45 years of age. Systematic compartment-oriented dissection of lymph node metastases improved survival (p < 0.005, T1-T3) and recurrence (p < 0.00001, T1-T3) especially in patients with T1-T3 tumors. In conclusion, lymph node metastases with a significant incidence at a young age and male sex had a substantial effect on survival and recurrence especially in those with tumor status T1-T3. Systematic compartment-oriented dissection of the lymph node metastases results in better survival and a lower recurrence rate.
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PMID:Prognostic significance and surgical management of locoregional lymph node metastases in papillary thyroid cancer. 772 45

Seventeen patients with papillary thyroid cancer whose serum thyroglobulin (Tg) levels were elevated when hypothyroid, but whose diagnostic whole body scans were negative, were treated with 150-300 mCi 131I. All patients had total thyroidectomy and 131I ablation for thyroid remnants. Before the study, 9 patients had 131I therapy for tumor recurrence and/or metastases, and 5 patients had excisions of nonfunctioning metastasis. Radiological studies did not reveal evidence of metastases. In the initial evaluation, Tg levels ranged from 8-480 ng/mL (24 pmol/L to 1.5 nmol/L), and posttherapy whole body scans (RxWBS) revealed undiagnosed local recurrence and/or metastases in 16 of 17 patients. Follow-up from 6 months to 5 yr is available in 16 patients. RxWBS after a second treatment was positive in 8 of 13 patients, and after a third treatment in 5 of 5 patients, although in 3 cases, uptake in distant metastasis had disappeared. In 8 patients, Tg fell to 5 ng/mL or less. In 1 patient, RxWBS became negative, but Tg remained elevated; subsequent treatment revealed local and mediastinal uptake, but previous lung uptake had disappeared. In 8 patients, RxWBS remains positive, and elevated Tg persists. A total of 35 RxWBS were performed; 29 were positive. Follow-up Tg concentrations decreased in 81% of patients after the first treatment, in 90% after the second treatment, and in 100% of the patients after the third treatment. Tg (mean +/- SE) decreased from 74 +/- 33 ng/mL in the first evaluation to 62 +/- 32 ng/mL in the second study and 32 +/- 20 ng/mL in the third study. The therapeutic effectiveness of 131I treatment in patients with elevated Tg and negative diagnostic whole body scans is indicated by the conversion to negative RxWBS, the statistically significant decrease in the mean Tg level, and the reduction of serum Tg to 5 ng/mL or less in 50% of patients. Further experience with this therapeutic approach is required to evaluate its effectiveness in improving prognosis and survival.
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PMID:Iodine-131 therapy for thyroid cancer patients with elevated thyroglobulin and negative diagnostic scan. 774 90

Aggressiveness of follicular (FTC) and papillary thyroid cancer (PTC) varies widely. Tumorigenesis is associated with an imbalance of growth-promoting and growth-constraining factors. We investigated the effects of thyrotropin (TSH), epidermal growth factor (EGF) and transforming growth factor beta 1 (TGF-beta 1) on invasion and growth of 3 FTC- and 2 PTC-cell lines. Invasion (penetration through an 8 microns pore membrane, covered by Matrigel) and growth were measured using the MTT-method. EGF (10 ng/ml) and TSH in low concentrations (1 mU/ml) stimulated invasion and growth of FTC and PTC, whereas TGF-beta 1 (10 ng/ml) and TSH in high concentrations (100 mU/ml) were inhibiting. The parental cell line FTC133 was considerably more responsive to all growth factors than the metastatic clones. Invasion of FTC133 was enhanced by 42% (EGF) and 21% (TSH), invasion of FTC236 by 8% (EGF and TSH). Conversely, invasion of FTC133 was inhibited by 32% (TGF-beta 1) and 21% (TSH), invasion of FTC236 by 18% (TGF-beta 1) and 11% (TSH). TSH, EGF and TGF-beta 1 have an important impact on differentiated thyroid cancer cells and metastases may have developed by escaping from the normal control of growth factors.
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PMID:[Growth and invasion in differentiated thyroid carcinoma. Function of different growth factors]. 785 Nov 42

Among 1,772 patients who registered at the MD Anderson Cancer Center between 1944 and 1991 with papillary thyroid cancer, 10 had malignant pleural effusion that developed during the course of the disease. At primary surgery, all 10 were found to have metastases to cervical lymph nodes. Seven of these patients also had invasion into adjacent soft tissues, 4 had lung metastases, and 1 had pleural effusion. All patients had radiologically apparent lung metastases at the time pleural effusion was found. Malignant effusion appeared 0 to 60 months after abnormal chest radiographs in 9 patients and 61 to 132 months after the initial diagnosis of thyroid cancer in 4 patients. Pleural effusions were treated with local radioisotopes or sclerosing agents, systemic radioiodine or chemotherapy, or both. All 10 patients died of thyroid cancer; overall survival time was 7 to 170 months (median, 27 months); however, appearance of pleural effusion preceded death by 1 to 20 months (median, 11 months). Malignant pleural effusion complicates the clinical course in 0.6% of adult patients with papillary thyroid cancer. It may develop many years after the initial diagnosis but is associated with greatly shortened survival time in all cases.
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PMID:Pleural effusion in patients with differentiated papillary thyroid cancer. 797 94

We present a case of childhood papillary thyroid cancer with persistent but stable pulmonary metastases for over three decades in order to highlight the natural history and clinical features of this unusual disease entity. A nine-year-old girl had thyroidectomy and cervical lymph node dissection followed by neck irradiation for invasive papillary thyroid cancer. Diffuse pulmonary metastases were present at the time of diagnosis and were treated with radioactive iodine 10 and 30 years later; both the chest radiographs and the patient remained stable throughout. This case illustrates the potential indolence of thyroid cancer when it presents during childhood.
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PMID:Papillary thyroid cancer with pulmonary metastases beginning in childhood: clinical course over three decades. 799 Jul 60

This study was aimed at assessing the role of CT in the investigation of extraductal spread of hilar cholangiocarcinoma. October 1990 to November 1993, twenty-one patients with hilar cholangiocarcinoma were examined. The diagnosis was made on the basis of the following CT findings: intrahepatic bile ducts dilatation, nonunion of the right and the left bile ducts, normal size of extrahepatic bile ducts and the tumor depicted "per se". As for extraductal spread, we considered parenchymal invasion, involvement of vascular structures and parenchymal, lymph node and peritoneal metastases. In all cases CT demonstrated intrahepatic bile duct dilatation and nonunion at the confluence. CT demonstrated a hypodense mass in 10/21 cases and an isodense mass in 11/21 cases. Portal vein involvement was detected in 7/10 cases and hepatic artery involvement was correctly suspected in 1/8 cases; CT demonstrated parenchymal and lymph node metastases in 1/6 and 2/7 cases. In conclusion, CT proved to be a valuable technique, like PTC and US, to assess tumor resectability.
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PMID:[Role of computerized tomography in the evaluation of extraductal extension of hilar cholangiocarcinoma]. 806 57

Invasion and metastasis may be caused by the escape of tumor cells from the negative control of growth factors. We analyzed the effects of transforming growth factor-beta 1 (TGF beta 1) on growth, migration, invasion, and adhesion in three follicular thyroid cancer cell lines (FTC133, primary; FTC236, lymph node metastasis; FTC238, lung metastasis) from one patient and in a papillary line (PTC-UC3). Cell growth was measured by dimethylthiazol-diphenyltetrazolium bromide assays, and migration (basal or epidermal growth factor stimulated) was determined by the ability of cells to penetrate 8-microns pore membranes that were covered with Matrigel for invasion assays. Moreover, we studied tumor cell adhesion to collagen type IV, fibronectin, and laminin. TGF beta 1 inhibited growth in FTC (FTC133, by 31%; FTC236, 15%; FTC238, 17%; P < 0.008), but not in PTC. Migration was inhibited in all cell lines. TGF beta 1 inhibited epidermal growth factor-stimulated migration of FTC133 by 43% vs. 29% without epidermal growth factor (P < 0.03). TGF beta 1 also inhibited invasion (FTC133, 32%; FTC236, 18%; FTC238, 16%; PTC-UC3, 32%; P < 0.02). All cell lines adhered preferably to collagen type IV and fibronectin. TGF beta 1 enhanced adhesion. Again, these effects were less pronounced in the FTC metastases. In conclusion, TGF beta 1 inhibits the growth, migration, and invasion of thyroid cancer cells in vitro. It enhances adhesion to components of the extracellular matrix. Metastatic thyroid tumors may be less responsive to the negative regulation of TGF beta 1.
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PMID:Transforming growth factor-beta 1 is a negative regulator for differentiated thyroid cancer: studies of growth, migration, invasion, and adhesion of cultured follicular and papillary thyroid cancer cell lines. 807 65

We evaluated the risk of bilateral or contralateral cervical lymph node metastases in 135 patients with papillary thyroid cancer who underwent bilateral neck dissection. We confirmed that bilateral jugular lymph node metastases were frequent in patients with obvious carcinoma in both lobes of the gland, in those with cancers arising in the isthmus, in those with clinically detectable bilateral lymphadenopathy, and in those with recurrent thyroid cancer. However, only 24% of the patients who had cancer clinically confined to one lobe with no bilateral or contralateral lymphadenopathy had histologically detected bilateral or contralateral jugular lymph node metastases. But the occurrence of contralateral jugular lymph node metastases was significantly correlated with both clinical lymphadenopathy in the ipsilateral neck and contralateral paratracheal lymph node metastases. Bilateral lymph dissection might be beneficial for these patients.
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PMID:Risk of bilateral cervical lymph node metastases in papillary thyroid cancer. 844 Dec 71


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