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Query: UMLS:C0027627 (metastases)
 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Dialysis dementia is a progressive and usually fatal neurologic syndrome occurring in patients on chronic hemodialysis. These patients may also have elevated levels of aluminum (Al+3) in the cerebral cortex. Possible relations between brain Al+3, increased Al+3 intake, and dementia were evaluated. Studies were done in seven groups of patients and five groups of experimental animals. In both normal dogs and rats and those with renal failure, oral Al+3 loading (Al[OH]3), resulted in significant increases of brain Al+3 (P less than 0.01). In patients with renal failure, who were neither demented nor treated with dialysis, brain Al+3 was more than seven times normal (P less than 0.01), whereas in patients with dialysis dementia, mean brain Al+3 was more than 15 times normal. However, the two groups were not significantly different. Brain Al+3 was also significantly elevated in patients who had either metastatic cancer or hepatic coma. Apparently brain Al+3 can be elevated as a consequence of Al+3 loading, renal failure, and abnormalities of the blood-brain barrier. It is most likely that dialysis dementia has multifactoral causation and is probably not caused by elevated brain content of Al+3 alone.
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PMID:Dementia, renal failure, and brain aluminum. 43 72

Surgery forms part of a combined oncological concept in the management of pulmonary metastases. The following questions are relevant for its role: Does survival depend on the type of primary tumor? Are there any prognostic factors? What are the limits on radical resection? We analyzed retrospectively 657 patients who had undergone 759 resections of pulmonary metastases between 1973 and 1990. After conducting in vitro and in vivo experiments with the non-contact neodymium aluminum garnet (Nd-YAG) laser with a generating and delivery power of 10-120 W at the site of operation for 0.1-9.9 s, we have treated 65 patients by laser resection and/or vaporization since January 1990. Our preferred surgical approach was median or transverse thoracotomy. The 5-year survival of all resected patients was 30%, ranging from 21% (soft tissue sarcoma) to 60% (testicular carcinoma). Statistically significant differences in prognosis were seen related to the type of primary tumor, the disease-free interval, the caval or portal type of metastatic spread, the number of metastases and the potential degree of radical resection. The potential degree of conventional radical resections (wedge, anatomical sub-/segmental) was negatively influenced by the number of metastases (n > 9: 79% "radical" surgery = 38% 5-year survival). Laser treatment allowed parenchyma-preserving resection in cases of metastases of more than 0.5 cm in diameter, and vaporization in smaller ones. Resection with the intention of achieving complete remission was possible in up to 72 unilateral metastases. The complication rate was comparable to conventional resections.
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PMID:Does ND-YAG laser extend the indications for resection of pulmonary metastases? 128 Apr 52

One hundred forty patients with carcinoma of the esophagus treated over a 12-year period at Queens Hospital Center were reviewed. Comparable numbers of patients were assigned at random to radiation therapy alone, surgical treatment with radiation, or treatment with combinations of radiation and chemotherapy pre- or postoperatively. Surgical mortality (survival 1 month or less) was 9 patients of 34, or approximately 26%. Mean survival including the early deaths was 7.5 months. Deaths were primarily due to respiratory tract complications, either alone or in combination, with three cases of anastomotic leaks, sepsis, inanition, and progressing carcinoma. Fifty-two patients received radiation therapy alone. Although there were only six deaths (10%) within the first month of treatment, average survival was 8.4 months, only marginally greater than those treated by surgery. Of 13 patients treated with combined radiation and chemotherapy, no deaths occurred within the first month of treatment, but the average survival was only 6.5 months. Of nine patients treated with chemotherapy alone, no deaths occurred within the first month of treatment, but mean survival of this small group was only 4.9 months. Efficacy of chemotherapy and radiation therapy as definitive, adjuvant, or palliative therapy, in spite of recent somewhat optimistic reports, remains to be proven. Exploratory surgery should be retained as an essential staging and therapeutic modality in those patients in whom definite evidence establishing inoperability is lacking; ie, tumor fixation to vital structures, distant metastases, and other medical contraindications to surgery. Endoscopic instrumentation with the yttrium aluminum garnet laser appears to have a future as preliminary to surgery or definitive (palliative) management of obstructing esophageal carcinoma.
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PMID:Carcinoma of the esophagus seen in a 12-year period at Queens Hospital Center. 169 95

Between May 1985 and December 1988, 41 patients were treated palliatively with endoscopic neodymium:yttrium-aluminum-garnet laser therapy for obstruction of the esophagus by malignant disease. All were considered incurable, because they presented with distant metastases, severe systemic disease, extensive local disease or recurrent disease. Thirty-nine percent were managed as outpatients; the remainder required admission to hospital. Sixty-three percent of the outpatients had adenocarcinoma, and 31% had squamous cell carcinoma; over 90% of the tumours were less than 8 cm long, and 63% were in the distal one-third of the esophagus or the cardia. Forty-four percent of the inpatients had adenocarcinoma, and 44% had squamous cell carcinoma; in this group, over 90% of the tumours were less than 8 cm long, and 56% were in the distal one-third of the esophagus or the cardia. The mean number of sessions and laser energy administered were 2.6 and 4949 J for outpatients and 2.7 and 4974 J for inpatients. Palliation of dysphagia was good to excellent in all outpatients but was not as good for the inpatient group, in which one major complication occurred. The mean length of survival for outpatients and inpatients was 6.3 months (range from 1 to 16 months) and 3.9 months (range from 1 to 18 months) respectively.
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PMID:Endoscopic Nd:YAG laser therapy of malignant esophageal obstruction on an outpatient basis. 170 41

Since 1986, limited resection of 561 pulmonary metastases in 25 patients was performed with the neodymium:yttrium-aluminum-garnet (Nd-YAG) laser. Use of the laser enabled a local excision of both superficially located and deep-seated tumors that would otherwise have required segmentectomy or lobectomy for safe removal. As a result, the 5-year survival rate for these patients was 40.3%. Since 1988, we also developed laser segmentectomy to treat primary lung cancer, and performed this procedure on 25 lung cancer patients. Of those, twenty-one patients had T1N0 disease. All are alive now and have had no local recurrence. The pulmonary distortion, which leads to impairment and loss of pulmonary function, was minimal in laser resection when compared to other procedures such as stapled resection or the casual ligation-division technique. In conclusion, we have found the Nd-YAG laser to be an effective tool both for preserving pulmonary function and for obtaining clear safety margins.
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PMID:[Usefulness of Nd-YAG laser for the excision of multiple lung metastases and segmentectomy for primary lung cancer]. 173 41

Between May 1969 and September 1989, 677 metastatic lesions were resected during 107 operations in 100 patients with pulmonary metastases from various primary sites at the Center for Adult Diseases, Osaka, Japan. Of those patients, 65 underwent conventional lateral thoracotomy, and 35 patients had median sternotomy. No significant difference existed in actuarial survival after the first operation to remove the metastases between the two patients groups. Furthermore, local excision of 418 lesions was performed in 25 patients with the neodymium:yttrium-aluminum-garnet (Nd:YAG) laser. Of those, 18 patients had undergone a one-stage operation for bilateral lesions through a median sternotomy approach. Although our study was not randomized, survival of the 25 patients treated with the Nd:YAG laser tends to be longer than survival of the 75 patients for whom the Nd:YAG laser was not used. We concluded that aggressive excision and evaporation of multiple lung metastases with the Nd:YAG laser under median sternotomy is a safe and promising variation in technique and that this approach will expand the scope of surgical indications for metastatic lung tumors. For a clearer demonstration of the influence of differences in surgical techniques on long-term survival it is necessary to conduct randomized prospective studies of the surgical techniques.
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PMID:Surgical management of lung metastases. Usefulness of resection with the neodymium:yttrium-aluminum-garnet laser with median sternotomy. 202 48

Palliative therapy for obstructing esophageal carcinoma is more often necessary than curative surgery. The neodymium:yttrium-aluminum-garnet laser was used for vaporization of obstructing esophageal carcinoma in 18 patients requiring 24 treatments. Three women and 15 men (age range 42 to 87 years) had esophageal carcinoma (seven squamous cell and nine adenocarcinoma). Twelve tumors were at the esophagogastric junction, four at the midesophagus, and two in the cervical esophagus. Lengths varied from 3 to 7 cm. Inoperability was due to diffuse metastases in eight patients, local invasion in five, poor operative risk in one patient, and patient refusal for operative treatment in four patients. Energy use was 1000 to 22,600 J per session (mean 6120 J). Good results were achieved in 16 patients (88.9%): Seven returned to full diet, five to soft diet, and four to full fluids without dysphagia. Four patients required retreatment 1 to 3 months later because of recurrent dysphagia. One patient was not benefited by the treatment and died of carcinomatosis 1 week later. No intraoperative complications occurred. Postoperatively, one patient had laryngeal edema and another had a bronchoesophageal fistula 3 weeks later. The mean survival time is 3 1/2 months. Neodymium:yttrium-aluminum-garnet laser vaporization for obstructing esophageal carcinoma is effective palliation regardless of histologic tumor type. It can be performed under direct vision with a low frequency of postoperative complications.
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PMID:Neodymium:yttrium-aluminum-garnet laser vaporization for palliation of obstructing esophageal carcinoma. 247 31

Yttrium aluminum garnet (YAG) laser therapy was performed through a gastroscope on 123 patients from 1980 to 1986. A complete cure with YAG laser therapy was obtained in patients with atypical epithelium of gastric mucosa and gastric polyps. Laser therapy (YAG) was very effective for the elevated type of early gastric cancer, and radical treatment can be expected for well-differentiated adenocarcinoma of less than 2 cm when tumor infiltration does not exceed the mucosa. YAG laser therapy for the depressed type of gastric cancer was not as effective and presents various problems. Argon-dye laser therapy, however, is more effective for the depressed type of gastric cancer. Endoscopic laser therapy is very effective, but it is necessary to be aware that lymph node metastases of gastric cancer have been found frequently, even in the early stage. Therefore, laser therapy must be performed under strict indications.
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PMID:Clinical evaluation of laser endoscopy for the treatment of gastric tumors. 297 78

Palliation of acute airway obstruction using the neodymium yttrium aluminum garnet (Nd-YAG) laser was studied in 54 patients who presented over a 42-month period to the Yale cardiothoracic surgery service. Thirty-seven patients had bronchogenic carcinoma; 27 had stage IIIB or IV disease. Nine patients had endobronchial metastases from a primary nonbronchogenic carcinoma. Eight patients had benign disease. A total of 109 Nd-YAG laser tumor ablations were performed. In addition, 32 patients underwent postoperative brachytherapy. Median survival for all patients was 12 months. Patients with bronchogenic carcinoma had a median survival of five months. Fifteen of 20 patients (75%) alive at the time of follow-up reported continued palliation as shown by an improved postoperative Karnofsky score. There was no survival benefit from Nd-YAG laser ablation of endobronchial bronchogenic carcinoma; however, the Nd-YAG laser provided good to excellent palliation in the majority of patients on long-term follow-up.
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PMID:Use of neodymium yttrium aluminum garnet laser in long-term palliation of airway obstruction. 754 64

We describe herein a new operative technique for reaching the opposite lung from the thoracotomy site through the mediastinum. This procedure was successfully performed on a 76-year-old woman with bilateral lung metastases whose case is presented. After resection of the right lower lobe which contained two metastases, the anterior mediastinum was opened, and contralateral metastasis located in the lingular segment was resected using a neodymium:yttrium-aluminum-garnet (Nd:YAG) laser. A chest drainage tube was inserted through the mediastinal window. This transmediastinal approach seems to be a feasible technique for preserving the respiratory function of the chest wall in patients with imbalanced bilateral metastases.
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PMID:A new approach for performing a one-stage operation through the mediastinum to resect bilateral lung metastases: report of a case. 764 Apr 61


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