A 26-year-old man is struck in the left arm by a swinging steel beam at a construction site. On physical examination, a 4-cm area of the lateral upper left arm exhibits swelling and redness with pain on palpation. A radiograph of the left arm shows no fracture. Three weeks later, there now is a 2-cm, painful, well-circumscribed, subcutaneous mass at the site of the original injury. A radiograph shows a solid soft-tissue mass. Which of the following lesions is most likely to be present?
□ (A) Malignant fibrous histiocytoma
□ (B) Organizing abscess
□ (C) Nodular fasciitis
□ (D) Superficial fibromatosis
□ (E) Lipoma
