Potassium metal was first isolated in 1807 in England by Sir Humphry Davy, who derived it from caustic potash (KOH, potassium hydroxide) by the use of electrolysis of the molten KOH with the newly discovered voltaic pile.
Angiomyolipomas are the most common benign tumour of the kidney. Although regarded as benign, angiomyolipomas may grow such that kidney function is impaired or the blood vessels may dilate and burst leading to bleeding.
Insulinoma is a benign tumor of the pancreas in 90% of patients and removalof the tumor cures the patient of the symptoms. Surgical removal of thetumor is the treatment of choice. More than 90% of patients will not requireany further treatment after removal of the tumor.