Abstract
Undifferentiated high-grade pleomorphic sarcoma (UPS), originated from bone, is a rare tumor, accounting for 2% to 5% of all primary maligment bone neoplasms. Skip lesion can be found in undifferentiated high-grade pleomorphic sarcoma of bone (UPS-B). However, the direct invasion across the articular synovium to bone has not been reported previously. We report an unusual case of a 65-year-old man complained of a year history of pain, swelling, and limitation of activity in the left knee joint. At the proximal tibia, there was extensive invasion of articular synovium, which provides a direct anatomic pathway for the tumor invasion to the adjacent bone, including patella and femoral condyle. Magnetic resonance imaging was important in defining the marrow involvement and joint invasion, including the thickening articular synovium. Subsequent pathological examination confirmed the diagnosis of UPS. The patient underwent an extensive resection of the knee joint, except for the patellar. After operation, routine chemotherapy was performed. Unfortunately, half a year later, soft tissue swelling of whole thigh was found. Then this patient came our hospital again. Positron emission tomography imaging showed there was recurrence of UPS w...Continue Reading
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Aug 9, 2019·Der Orthopäde·Volker Vieth
Apr 17, 2019·Skeletal Radiology·Ceylan ColakCarl S Winalski
Oct 6, 2018·Skeletal Radiology·Asif SaifuddinJeremy Whelan
Jan 8, 2021·Skeletal Radiology·Rupert BerkeleyAsif Saifuddin