Because of this, it is even more difficult to appreciate the infiltrate behind the heart. Upon close inspection, you should be able to appreciate the triangular density superimposed on the heart on the chest radiograph view. A lateral view of the chest was not taken in this case since the chest view was part of an abdominal series that was ordered. The patient was placed on antibiotics and his fever promptly improved by the next day. His abdominal pain and his other symptoms gradually improved.
Pneumonia is a known cause of abdominal pain.
This diagnosis is often not considered because the abdominal pain is the chief complaint. The pain can be very severe at times. This can easily mislead a clinician to limit the area of investigation to the abdomen. This pitfall should be avoided. Adult conditions that are less likely but still possible in children include myocardial ischemia and aortic dissection.