Sarcoma

Left pelvic limb: There is a large, soft-tissue opacity mass in the left pelvic limb, caudal to the femur and tibia. The borders of the mass are irregularly margined. There is mottled soft tissue and fat opacity in the subcutaneous tissues of the distal pelvic limb, and the soft tissues are thickened. There is effusion in the left stifle joint with surrounding osteophyte formation. The tissues surrounding the prepuce are also thickened. No aggressive lesions are present in the femur or tibia.

Thorax: The cardiovascular structures are normal in size and shape. The thorax is hypoinflated. No pulmonary nodules are visible. There is a small convex opacity dorsal to the second sternebra. The mediastinum and pleural space are normal. There is mild osteophyte formation in the shoulder joints.

There is a heterogeneous, isoechoic mass measuring 4.0 cm in the spleen. The mass does not deform the splenic capsule. There is a large, multilobulated mass at the medial and caudal aspect of the left femur. This mass appears to be moderately vascularized and mildly septated. An additional mass with the same type of echogenicity is visible in the left abdominal flank. This mass is mildly vascularized and does not appear to invade the abdominal cavity. Fine-needle aspiration of the splenic mass and the left thigh were performed without evidence of immediate complication.