Nail Clubbing.....most frequently associated with causes like 1.Congenital cyanotic heart disease. 2.Lung disease i.e. suppurative cause as bronchieactasis. 3.Ulcerative colitis. 4.Birth defect i.e. idopathic. 5.Infection..(chronic suppurative condition) 6.Neoplastic..i.e.Hodgkin,most commonly lung cancer.......