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Query: UMLS:C0028754 (obesity)
 124,988 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The metabolic mechanism for increased circulating free fatty acids in post-menopausal women with metastatic breast cancer was investigated. Hormone and metabolic response to glucose and growth hormone were compared to cancer patients and control subjects; thyroid, adrenal and pituitary function were evaluated. The results of these studies indicated that breast cancer patients had glucose intolerance and delayed and prolonged insulin secretion, increased basal growth hormone levels and insensitivity of adipose tissue to growth hormone. Cortisol and protein-bound iodine levels were normal and there was no lipolytic factor in the sera of breast cancer patients. The changes observed in breast cancer patients were not attributable to age, obesity, inanition or stress. These metabolic abnormalities may characterize host susceptibility to breast cancer or be effects of tumor.
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PMID:Metabolic parameters in women with metastatic breast cancer. 4 95

There is normally a layer of fat in the breast between the parenchyma of the breast and the skin. This is frequently thin and does not preclude the palpation of a tumor mass which involves the breast parenchyma. In patients suffering from obesity this fat pad becomes much thicker and obscures any underlying masses arising from the breast parenchyma. A case is reported in which a woman who was markedly obese lost a significant amount of weight and presented a bulge which was found to be carcinoma. This situation, in which fat obscures underlying breast lesion, has been observed in a number of patients. Attention is called to the limited value of physical examination of the breast in markedly obese patients. If any suspicion exists or if the patient is a candidate for cancer from a familial standpoint, mammograms are indicated.
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PMID:Obesity obscuring breast cancer: a case report. 19 Apr 79

At the Wilford Hall U.S. Air Force Base Medical Center, Texas, about 4000 postmenopausal women received estrogen replacement therapy during 1975. Of these, 2700 took estrogens only and 1240 were given a progestogen along with estrogen. Hysterectomy had been done previously on 1700 patients (42%), leaving 2300 with intact uteri and a risk of endometrial cancer. Adenocarcinoma of the endometrium was diagnosed in 7 patients. Of these, 6 had received estrogen therapy. There was 1 endometrial malignancy in a patient also receiving a progestogen. Among 510 untreated postmenopausal women with intact uteri, 1 adenocarcinoma of the endometrium was found. Type and dosage of estrogen were unrelated to endometrial malignancy. In addition to the 7 endometrial cancers from the clinic, 22 cases were diagnosed elsewhere and referred for treatment, 11 of these had received no hormones. 10 were taking estrogens and 1 was receiving Oracon for birth control. The incidence of endometrial malignancy in the U.S. is reported to be 21/100,000 women/year. There is a 3-fold to 9-fold increased risk of endometrial cancer associated with obesity alone. The probability that untreated postmenopausal women with intact uteri will develop carcinoma of the endometrium is 1/1000/year. With estrogen users, it is reported to be increased -7.6/1000 women/year. In the author's clinic during 1975, the incidence among those receiving only estrogen was 4.7/1000. Among those also receiving a progestogen the incidence was .8/1000. Unopposed estrogens apparently have a role in the etiology of endometria hyperplasia and neoplasia through incomplete shedding of the endometrium. Progesterone produces more complete sloughing of the endometrium and also converts all degrees of hyperplasia into secretory endometrium. Nulliparity, infertility, and anovulation are predisoposing factors to endometrial carcinoma. Progestogens are palliative therapy for endometrial cancer.
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PMID:Estrogens, progestogens and endometrial cancer. 19 79

The presenting signs, symptoms, roentgenographic findings, endocrine evaluations, treatment, and results in 68 cases of presumed pituitary adenomas treated over an 18-year period are discussed. The most common symptoms were headache, acromegalic changes, visual symptoms, and amenorrhea. Most common physical findings were obesity, acromegaly, and visual field defects, usually bitemporal hemianopsia. Roentgenographic evidence of sellar erosion was almost universal but angiography and pneumoencephalography were required to evaluate suprasellar extension. Brain scan was not considered a particularly useful diagnostic tool. Endocrine status was best evaluated by a battery of tests including 17-OH, 17-KS, T3, T4, PBI, ACTH stimulation, and FSH and STH levels. (Prolactin levels are currently being obtained, also). Surgical specimens were obtained in 29 patients, with subsequent diagnoses of 22 chromophobe adenomas, five eosinophilie adenomas, one cystic adenoma, and one necrotic tumor. All five eosinophilic tumors came from acromegalic patients. Patients treated by operation alone or operation followed by radiotherapy generally had less "medical morbidity" than did patients who received radiotherapy alone.
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PMID:Review of 18 years' experience with pituitary tumors. 19 48

Previous studies have shown that the sensitivity of tissues to insulin is diminished in states of glucocorticoid and GH excess and is increased when these hormones are deficient. To evaluate the role of the insulin receptor in these states, we have studied [125I]insulin binding to purified liver plasma membranes obtained from rats with a variety of perturbations of both glucocorticoids and GH. Glucocorticoid excess was produced in rats by administration of ACTH (40 U/day for 4 days) or dexamethasone (1 mg/day for 4 days). This resulted in an insulin-resistant state. Associated with this insulin resistance, there was a 50-60% decrease in insulin binding to its specific receptors in liver. Conversely, adrenalectomy, which produces an increase in insulin sensitivity, was associated with an increase in insulin binding to liver. Computer-assisted Scatchard analysis using a negative cooperative model for the inulin-receptor interaction indicated that, in contrast to our findings with obesity, the changes in insulin binding in these states were most likely due entirely to changes in receptor affinity, with no change in receptor concentration. GH administration also produced mild insulin resistance and a decrease in receptor concentration. This was associated with a reciprocal increase in receptor affinity and thus, no major alteration in insulin binding occurred at low physiological insulin concentrations. Hypophysectomized rats, on the other hand, showed an increase in receptor concentration and a decrease in affinity, and GH treatment only partially corrected these changes. Rats implanted with the MtT tumor (which secretes ACTH, GH, and PRL) have the combined effects of excess glucocorticoids and GH and are very insulin resistant. Liver membranes prepared from these rats showed a decrease in insulin binding and receptor affinity similar to that observed in other states of glucocorticoid excess. Further, adrenalectomy of the tumor-bearing rats resulted in an increase in insulin binding despite the persistence of the elevated levels of GH, ACTH, and PRL. These findings suggest that alterations in insulin receptor affinity and number may play a major role in the states of altered insulin sensitivity which accompany glucocorticoid excess and deficiency, and follow hypophysectomy. In contrast, the insulin resistance associated with GH excess is mediated at either a site on the receptor distal to the insulin-binding site (i.e. transduction) or at one or more of the intracellular reactions important in insulin action.
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PMID:Alterations in insulin binding induced by changes in vivo in the levels of glucocorticoids and growth hormone. 21 65

Ectopic ACTH syndrome is a clinicopathologic condition produced by certain tumors which release hormone that is indistinguishable from ACTH. It orginates the chemical and clinical anomalies characteristic of Cushing's syndrome by its action on the adrenal glands. The tumors may be present in any organ, though they are most frequently found in the lungs, thymus, pancreas or gastrointestinal tract. They may be benign or malignant, though usually the latter. Secretion of the hormone is completely autnomous; it is release in a way similar to that of the hypophysis. Not infrequently other hormones besides ACTH are also produced, such as MSH, serotonin, and CRF. Ectopic ACTH is of higher molecular weight than hypophyseal ACTH, which suggest it may be comprised of the latter bounded covalently to a peptide. The clinical course is rapid, so that not all of the symptoms of Cushing's syndrome develop. Moon face, osteoporosis, and obesity are typically lacking; melanodermia and hypokalemic alkalosis ofter appear. Laboratory data include an increase in ACTH and cholesterol concentrations, disappearance of the nictameral rhythm, and an increase in urinary excretion of 17-hydroxycorticoids and 17-ketosteroids. Stimulation and supression tests are abnormal. The prognosis is poor and the only possible treatment is a complete surgical removal of the tumor. Irradiation or chemotherapy could be applied as well as the correction of the adrenal hyperfunction by the administration of drugs or by total bilateral adrenalectomy.
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PMID:[Ectopic ACTH syndrome (author's transl)]. 22 77

The patient is a 17-year-old female. She was suffering from dwarfism, irregular menstruation and obesity. Out of the dwarfism, there were no other neurological abnormalities. The serious clinical examinations were performed, and the cerebral angiography and the CT scan demonstrated the findings of the obstructive hydrocephalus. Namely, enlarged IIIrd ventricle and small IVth ventricle were observed with routine CT scan. Because these findings on CT scan, we thought the hydrocephalus was based on the aqueductal stenosis. The vertebral angiography showed stretched posterior medial choroidal arteries and compressed the basilar tip posteriorly and inferiorly. Moreover, the carotid-angiography demonstrated the following findings, unrolling of the anterior cerebral arteries laterally stretched bilateral lenticulostriate arteries laterally shifted sylvian groups of the middle cerebral arteries, and stretched bilateral internal cerebral veins. Judging from that angiographic findings and CT scan, we thought there would be cystic tumor in the IIIrd ventricle. However, we suspected the IIIrd ventricular tumor, we were not able to differentiated it from the enlarged IIIrd ventricle itself exactly. Because, it's density in CT scan was equaled with that the cerebrospinal fluid. According to above facts, we performed "Amipaque CT ventriculography through the ventricular catheter after V-P shunt. By "the Ampiqque CT ventriculography" we found exactly there was large cystic tumor in the IIIrd ventricle. Their manifestation and some differential diagnosis were discused.
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PMID:[Diagnosis of IIIrd ventricular cyst with "amipaque (metrizamide) CT ventriculography (author's transl)]. 30 73

Diet and nutrition may be an indirect cause of human breast cancer. This review of the literature identifies high risk groups, geographic variables, experimental animal studies, and endocrinal research that link diet and obesity to aberant hormonal activity that can cause breast cancer. Studies of high risk groups indicate that some women are predisposed to breast cancer because of similar dietary habit that often cause obesity. Geographical factors influence the kinds of food available to a given population. As a result, people who live in areas that supply a rich diet of sugar, starches, and fats have a higher incidence of obesity and breast cancer than those people who have simple diets. Experimental studies on laboratory animals show that diets with reduced calories, fat, and proteins inhibit tumor development. The results of these studies, although intesting, are impractical for application to human subjects. Studies that address the relationship between breast cancer and specific hormones include investigations of androgens, estrogens and prolactin. At present, these studies are inconclusive and often conflicting. Many dietary factors appear to be causal of breast cancer, especially as they interact with each other. An individual's metabolism, synthesis of hormones, and amount of fat tissue can be predisposing factors for breast cancer. Future research should focus on these interacting factors so that workable, preventative health programs can be developed.
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PMID:Diet and breast cancer: a review. 36 82

The woodchuck or groundhog (Marmota monax) has been used as a biomedical model for studies of obesity and energy balance, endocrine and metabolic function, central nervous system control mechanisms and cardiovascular, cerebrovascular and neoplastic disease. Methods of care of a woodchuck colony, techniques for handling, restraint, anesthesia, blood sampling and breeding were developed.
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PMID:The woodchuck, Marmota monax, as a laboratory animal. 52 75

Correlations between obesity and prognosis of operated cancer of the breast have not been investigated until now. In 491 patients operated upon by radical mastectomy (1968 to 1972) it can be demonstrated that in patients in whom the weight of the resected breast is above 1100 g the survival rates are more unfavourable than in other cases. As to tumor size and invasion of lymphnodes the distribution in the group with "heavy breasts" is more unfavourable than in the other groups. The causes of the differences in survival may be attributed to worsened conditions for detection of cancer in cases with large breasts as well as to alterations of hormone production and metabolism in connection with nutritional factors.
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PMID:[Relationship between obesity and prognosis in operated breast cancer (author's transl)]. 54 81


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