Spontaneous retroperitoneal hemorrhage is rare. Image-guided embolization of supplying vessels is now deemed to be best practice, and therefore CT angiography is advised if not already done.

In this case, a follow-up CT angiography was performed 4 hours later and it did not show any evidence of active bleeding.

COVID-19 has a clear prothrombotic tendency. It was noted early in the pandemic that there was an increased prevalence of pulmonary thromboemboli in COVID-19.