A 56 year old man afraid of contracting COVID-19 was referred by the trauma hospital with recent magnetic resonance imaging (MRI) for suspected malignancy because of increasing right thigh swelling. Five years prior his then girlfriend had stabbed him with a 15 cm knife. The swelling began one year previously without additional trauma, recently increasing dramatically, causing tenderness and significantly limiting mobility. MRI (A and B) showed an 18 × 12 × 14 cm mass (arrowed) but as expected could not indicate bleeding. Ultrasound and computed tomography angiography confirmed the suspicion of underlying haemorrhage and the patient immediately underwent successful surgery with ligation of an actively bleeding side branch of the deep femoral artery and haematoma evacuation.