Computed tomogram without contrast showing large right CSDH extending from the frontal lobe to the parietal lobe with blood in the lateral ventricles. Computed tomogram without contrast showing large right CSDH extending from the frontal lobe to the parietal lobe with blood in the lateral ventricles. There is mass effect with effacement of the sulci, compression of the cerebral hemisphere and midline shift to the left. V Adhiyaman et al. Postgrad Med J 2002;78:71-75 Copyright © The Fellowship of Postgraduate Medicine. All rights reserved.