Thyrotoxicosis in a 13-year-old girl following pituitary adenectomy for Cushing's disease.

Our objective is to report a case of thyrotoxicosis following pituitary adenectomy for Cushing's disease, the only pediatric case to our knowledge. No thyroid antibodies were detected, and the thyrotoxicosis was successfully treated for 3 months with no relapse after 5 years of follow-up. The cause of thyrotoxicosis remains unknown.

[A case report - Severe electrolyte disturbances in an eight week old boy]. / Sjúkratilfelli - lífshaettulegar truflanir á blódsöltum hjá átta vikna dreng.

Hyponatremia is the most common electrolyte abnormality in children and underlying causes are many. It is most often caused by excessive salt loss from the gut but is also associated with severe systemic disorders in which there is actual or apparent aldosterone deficiency, such as congenital adrenal hyperplasia (CAH), which is the most common inherited disorder of aldosterone synthesis, and pseudohypoaldosteronism (PHA). Abscent aldosterone activity also leads to hyperkalemia which is characteristic for PHA and can result in life threatening arrythmias. This is a case report about a boy presenting with life threatening electrolyte disturbances in conjunction with PHA resulting from pyelonephritis and vesicoureteral reflux.