Kaposi's sarcomaKawasaki diseaseKeratosis pilarisKidney cancerKidney disease, chronicKidney infectionKidney stonesKidney transplantKlinefelter syndromeKnee painKnee replacementKnee surgery, anterior cruciate ligamentKnee, housemaid'sknee-painKneecap dislocationKnock kneeKoilonychia (spoon-shaped nails)KwashiorkorKyphosis