Mass-forming testicular abscess. A 69-year-old male who presented with recent onset of right testicular pain and palpable mass. Gray scale US image shows a heterogenous mass with ill-defined borders and central cystic areas. The imaging appearance was concerning for a paratesticular sarcoma (arrows) infiltrating testicular parenchyma (asterisk). Orchiectomy revealed no evidence of malignant disease but organized testicular abscess with paratesticular extension