Age / Sex : 38 / F

Chief complaint : numbness, palpable mass and pain in the Lt. thigh


What is your diagnosis?

Two weeks later, you can see the final diagonosis with a brief discussion of this case (Please submit only one answer).

Courtesy: 이슬기 (Seul Ki Lee), 성빈센트병원(St. Vincent’s Hospital)

Synovial Sarcoma of the Peripheral Nerve

Discussion

Findings

1.A 4cm sized well encapsulated ovoid mass is located posterior to the Lt. psoas muscle and runs along the Lt. sciatic nerve. The tumor is located in the central portion of the nerve with peritumoral edema

2.Heterogeneously high signal intensity lesion without target sign or fascicular sign.

3.Axial fat-suppressed enhanced T1-WI mostly shows marginal enhancement, and some evidence of total necrosis

1.Benign peripheral nerve sheath tumor

2.Malignant peripheral nerve sheath tumor

• Synovial Sarcoma of the Nerve—Clinical and Pathological Features: Case Series and Systematic Review


• Burks, Stephen. NeurosurgeryVolume: 85 Issue 6 (2019) ISSN: 0148-396X Online ISSN: 1524-404


• Synovial sarcoma mimicking benign peripheral nerve sheath tumor


• Larque, Ana. Skeletal RadiologyVolume: 46 Issue 11 (2017) ISSN: 0364-2348 Online ISSN: 1432-2161