A 70-year-old male is admitted to the
ward for investigation of a change in bowel habit. On examination he looks
well, he is not in respiratory distress, pulse rate 80 beats per minute
regular, BP 140/60; no abnormality was detected on examination of his chest
and abdomen. He has a chest x-ray as part of the routine work up in your unit.
The chest x-ray shows a calcified pleural plaque located in the diaphragmatic
pleura on the right hand side.
Which of the following is likely in