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.
Definition of Angiomyolipoma of the Kidney. Angiomyolipoma of the kidney is a rare benign renal tumor with a high fat content. Epidemiology of Renal Angiomyolipoma. Prevalence: The prevalence in autopsies is 0.3%, with ultrasound screening 0.1%. Women are much more frequently affected than men.
hemangioma. 1. a benign tumor, usually in infants or children, made up of newly formed blood vessels and resulting from malformation of angioblastic tissue of fetal life. 2. a benign or malignant vascular tumor resembling the classic type but occurring at any age.n the majority of cases it appears as a network of small blood-filled capillaries near the surface of the skin, forming a reddish or purplish birthmark. cavernous hemangioma a congenital vascular malformation that has a soft, spongy consistency and may contain a large amount of blood.