Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 55 2 2017 02 21 131 133 EN Hamid Emadi Koochak Department of Infectious Diseases, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. Elnaz Tabibian Department of Infectious Diseases, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. Shahram Rahimi Dehgolan Department of Infectious Diseases, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. 2017 02 15 2017 02 15 Pneumonia is considered as the main cause of abdominal pain in children whereas it presents mostly by respiratory symptoms in adults. Here we present a 71-year-old Iranian female who complained specifically of abdominal pain on admission to our emergency department. We had found nothing as an etiology in our first evaluations. After several hours chest pain was added to the symptoms and the following chest, X-Ray showed a consolidation in the right lung base. She was treated by pneumonia antibiotic regimen and discharged after seven days in a good clinical condition. In conclusion, pneumonia should be considered as a differential diagnosis of abdominal pain in adults as well as in children. https://acta.tums.ac.ir/index.php/acta/article/view/6234 https://acta.tums.ac.ir/index.php/acta/article/download/6234/4908