Glossary Please select an letter from the A-Z list or search # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Kaposi's sarcoma Lesions on the skin and/or internal organs caused by abnormal growth of blood vessels. Karnofsky score A number between 0 and 100 which is assigned by a doctor to describe a patient's ability to function, as measured by the performance of common tasks. kidney Organ that removes waste products from the blood. kidney stone Stone-like lumps that develop in the kidneys. Made up of crystals which form as the kidneys clear waste products from the blood. KS Short for Kaposi's sarcoma.