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DIABETES INSIPIDUS. DIFFICULTIES IN DIAGNOSIS AND TREATMENT; USE OF SYNTHETIC LYSINE-8 VASOPRESSIN IN PATIENTS INTOLERANT OF OTHER THERAPY.

Frequent errors in the diagnosis of diabetes insipidus arise from (1) failure to produce an adequate stimulus for release of antidiuretic hormone, and (2) failure to appreciate acute or chronic changes in renal function that may obscure test results. Properly timed determination of body weight, urine volume and serum and urine osmolarity during the course of water deprivation, and comparison of these values with those obtained after administration of exogenous vasopressin, eliminates most diagnostic errors. In four patients who had experienced local and systemic reactions to other exogenous forms of vasopressin, diabetes insipidus was satisfactorily controlled by administration of synthetic lysine-8 vasopressin in nasal spray. A fifth patient was also treated satisfactorily with this preparation.

Aerosols↗

Acute post-traumatic diabetes insipidus: treatment with continuous intravenous vasopressin.

A young male presented within hours after closed head injury with hypotension, tachycardia, and polyuria. A diagnosis of post-traumatic diabetes insipidus was made. Although a rare entity, the rapid diagnosis of diabetes insipidus and early treatment with vasopressin may have been life-saving in this case. A detailed approach for treatment with continuous intravenous vasopressin may be the most accurate and efficient method of managing acute onset diabetes insipidus, especially in the hemodynamically compromised patient. This will allow for a controlled fluid management in order to achieve hemodynamic stability and prevent aggravation of cerebral edema.

Acute Disease↗

Diabetes insipidus for five years preceding the diagnosis of hypothalamic Langerhans cell histiocytosis.

We report a case of an adult male with Langerhans cell histiocytosis (LCH), in which the hypothalamic involvement went undetected by radiology and who was diagnosed as having central diabetes insipidus for 5 years before the skin lesions and the hypothalamic mass became evident on a CT scan. The skin lesions spontaneously disappeared but relapsed 12 months later. The hypothalamic mass disappeared six months after low dose radiotherapy with persistence of diabetes insipidus and loss of thirst sensation. We did not observe relapse of the hypothalamic mass within the five years of post-radiotherapy follow-up. Despite the fact that patients with LCH may experience spontaneous remissions and exacerbations in their clinical manifestations, the patient's long-term evolution suggested the mass was cured. We would like to draw the attention of clinicians to the necessity of long-term follow-up in patients initially diagnosed of idiopathic central diabetes insipidus. Furthermore, low dose radiotherapy is a successful treatment for LCH-dependent masses in the hypothalamus; however, normalization or regression of CT abnormalities after radiotherapy did not affect the clinical diabetes insipidus status.

Adult↗

Water-balance hormones during long-term follow-up of oral dDAVP treatment in diabetes insipidus.

The aim of the present study was to investigate the hormonal control of water-balance in children with diabetes insipidus and to assess safety and efficacy of long-term treatment with oral dDAVP. Plasma atrial natriuretic peptide, plasma renin activity, aldosterone, plasma and urinary cyclic 3'5'-guanosine monophosphate and urinary prostaglandin E2 were measured in eight patients (aged 3-21 y) with central diabetes insipidus. At baseline, 12 h after the last dDAVP dose, patients had hypotonic polyuria but normal plasma sodium concentrations and plasma osmolality relative to a control group. The mean plasma atrial natriuretic peptide concentration in patients (26.2 +/- 2.6 pg/ml) tended to be lower than in controls (36.5 +/- 8.2 pg/ml, mean +/- SEM), although the difference was not significant. Plasma cyclic 3'5' guanosine monophosphate was higher in controls (6.0 +/- 0.6 pmol/ml, mean +/- SEM) than in patients (3.8 +/- 0.3 pmol/ml). Aldosterone, plasma renin activity, urinary cyclic guanosine monophosphate and urinary prostaglandin E2 were similar in the two groups. During 3 h following dDAVP administration, atrial natriuretic peptide levels did not change in patients but decreased significantly in controls to 23.0 +/- 4.0 pg/ml. No adverse reactions, or circulating antibodies against dDAVP, were observed after 3.5 years of oral dDAVP treatment. The average oral dDAVP dosage was similar after 1 and 3.5 years of treatment (906 +/- 406 micrograms/24 h, mean +/- SD). Water-balance is not detectably different from normal in correctly treated diabetes insipidus patients in terms of plasma atrial natriuretic peptide, plasma renin activity and aldosterone levels. Long-term oral dDAVP treatment is safe and efficacious.

Administration, Oral↗

Evaluation of anterior pituitary function in patients with posttraumatic diabetes insipidus.

Serum LH, FSH, TSH, PRL, GH, and cortisol were measured in 10 patients with posttraumatic diabetes insipidus both basally and after a combined insulin-induced hypoglycemia, LRH and TRH test. Two patients did not show hormonal abnormalities, while 8 patients had deficiencies of 1 or more hormones. The most frequent abnormality was GH deficiency (50%), followed by TSH (40%), ACTH (30%), FSH (30%0, and LH (20%). These results indicate that anterior pituitary dysfunction frequently accompanies posttraumatic diabetes insipidus.

Adolescent↗

Diabetes insipidus.

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Diabetes Insipidus↗

Bronchogenic carcinoma and diabetes insipidus: case report and review.

Tumor metastasis to the posterior pituitary-hypothalamic area rarely is expressed by either clinical or radiographic evidence. A case is reported of widespread metastic ACTH secreting bronchogenic carcinoma presenting to the clinician as diabetes insipidus. This type of tumor associated with diabetes insipidus is apparently rare, as is antemortem radiographic documentation of metastasis to the pituitary--hypothalamic region. A review of the ten-year experience of Loyola University Medical Center and Hines VA Hospital with the association of bronchogenic carcinoma and diabetes insipidus is presented with a brief review of metastic disease to the pituitary.

ACTH Syndrome, Ectopic↗