DOI: https://doi.org/10.36347/sjams.2026.v14i06.004

Pages: 904-910

We present a 63-year-old patient with a left posterior thigh mass that had been evolving for 6 months, causing sciatic nerve compression. MRI showed a large tumor centered on the semimembranosus muscle, displacing the sciatic nerve and popliteal artery. Biopsy concluded a grade III undifferentiated unclassifiable sarcoma. Given the patient's refusal of a hip disarticulation proposed by the multidisciplinary team meeting, embolization of the feeding arteries was performed, followed by palliative resection with nerve release. The postoperative course was uneventful; the patient then received chemotherapy and radiotherapy before being lost to follow-up.