Fig. 1

a and b preoperative CT: There were many irregular high and low mixed density shadows near the left lower abdomen and abdominal aorta, with clear demarcation and multiple patchy and banded calcification. The larger one was about 5.0 × 6.3. The enhanced lesions were unevenly enhanced. Pathology of (c and d) showed that spindle cell tumors were accompanied by a large number of hyaline degeneration and small focal ossification. e, f recurrence CT: There were a few masses, nodular high density lesions and soft tissue masses in the left lower abdomen. The largest size was about 4.8 *5.3 cm. On contrast-enhanced CT, uneven enhancement was seen, and nodular calcification was seen in them