A 56-year-old man presents with 4 months of progressive abdominal fullness, vague left-sided discomfort, early satiety, and 6 kg weight loss. Examination reveals a large, firm, non-tender, poorly mobile mass filling the left upper and mid abdomen. Contrast-enhanced CT shows a large heterogeneous retroperitoneal mass (18 × 14 × 12 cm) containing regions of **macroscopic fat attenuation admixed with nodular enhancing soft tissue components and internal septations**, as marked by **A** in the diagram. The mass displaces adjacent organs anteriorly without direct invasion. AFP and β-hCG are normal. Core needle biopsy confirms the diagnosis. Based on the imaging characteristics of the structure marked **A**, which of the following is the most likely histological diagnosis?
Ready to test yourself?
Test your Surgery knowledge with AI-powered MCQs and detailed explanations — no signup required to try.
Sign up free and practice all 1 Retroperitoneal Sarcoma MCQs with AI-powered explanations tailored to your performance.
Create Free Account