28th August 2020

A 55-year-old male presents with a 1-day history of severe pain in his back

A 55-year-old male presents with a 1-day history of severe pain in his back followed 8 hours later by pain in his abdomen. He also describes being unable to pass urine for the past day. On examination, there is a smooth palpable mass extending from his pelvis to the umbilicus.   

For the patient above, please select the SINGLE most likely diagnosis. Select ONE option from the list above.