The CT findings in patients with leukaemia consist mainly of ground-glass attenuation, centrilobular nodules and thickening of the bronchovascular bundles in the peripheral lung. The combination of ground-glass opacities and the thickening of the bronchovascular bundles can produce the crazy-paving pattern [26] . Accumulation of fluid in the alveolae causes the ground-glass opacification. Accumulation of fluid along the interlobular septa and along the walls of the alveolae can cause the periacinar pattern.