An 80 year old woman presents with a painful and tender lump in her left groin for 2 days. She is otherwise asymptomatic, and cannot recall noticing a lump in the same area prior to this. Her only comorbidity is essential hypertension, which is well controlled via diet alone.
The ultrasound scan shows a smoothly marginated, uniformly echogenic, doughnut shaped structure surrounded by fluid in the left groin.
WBC/DC: 7,000/mm3 (4,500-11,000) Neutrophils: 70% Lymphocytes: 28% Hb: 14.1 g/dL (11.5-18.0) Platelets: 248,000/mm3 (150,000-400,000)
You realize that CT imaging of the abdomen is probably not necessary here.
The Doppler scan of the left lower limb shows a normal arterial and venous system, with no evidence of aneurysms or varices.