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.
By Dr Ananya Mandal, MD. Hemangioma is a benign tumor that occurs in the endothelial lining of the blood vessels. These tumors usually develop within the first few weeks of life but often resolve independently by time a child is ten years of age. Hemangioma is the most common type of tumor found in children.