Chondrosarcoma of the patella

Abstract

Rationale:Chondrosarcoma, characterized by the production of cartilage matrix, is a common bone tumor, accounting for 20% to 27% of all malignant bone tumors. It often occurs in the cartilage of the pelvis, femur, tibia, and humerus. However, chondrosarcoma of the patella is extremely rare.Patient concerns:The present study describes a case of chondrosarcoma affecting the right patella in a 68-year-old woman. The chief complaints were painful swelling and limitation of motion of the right knee for about half a year. The pain was a kind of dull ache. The skin around the right knee was red and hot. Moreover, she had a claudication gait due to the symptoms.Diagnoses:Irregular lytic lesions with ill-defined margins in the patella were determined through computed tomography and magnetic resonance imaging. The diagnosis of primary grade II chondrosarcoma was finally confirmed on the basis of postoperative pathological examination.Interventions:The patient underwent an open surgery named extensive resection of patellar tumor to remove the tumor tissue completely.Outcomes:The patient was discharged without any complications 1 week after the surgery. At the 3-month follow-up, the patient was completely free from pain during daily activities, and normal range of motion of the right knee was achieved. Her gait was normal. There was no evidence of recurrence.Lessons:We believe that an extensive resection is suitable for treating chondrosarcoma to avoid as far as possible local recurrence. An awareness of the potential for chondrosarcoma to present in the patella is crucial for both orthopedic surgeons and radiologists when confronted with similar cases. Besides, as reports of chondrosarcoma of the patella are rare, this study adds a better understanding of this rare condition to the medical literature.

Innovative chest wall reconstruction with a locking plate and cement spacer after radical resection of chondrosarcoma in the sternum: A case report

“…Chondrosarcomas are hyaline-producing tumors that commonly arise in the axial and proximal appendicular skeleton. They are commonly found in the pelvis, proximal femur, proximal humerus and proximal tibia, but rare cases of chondro-sarcoma in the patella and scapula have also been reported[ 1 , 18 ]. The disease’s clinical presentation may vary depending on the tumor grade.…”

Bacteriophage‐mediated therapy of chondrosarcoma by selective delivery of the tumor necrosis factor alpha (TNFα) gene

“…It accounts for 20-27% of primary malignant bone neoplasms. 1 The most common anatomical location of this cancer is the pelvis, followed by the proximal femur, proximal humerus, distal femur, and ribs. 2 Most CS patients suffer pain, swelling, and the presence of a mass of variable duration.…”

“…Chondrosarcoma (CS) is a group of cartilage‐forming tumors. It accounts for 20‐27% of primary malignant bone neoplasms 1 . The most common anatomical location of this cancer is the pelvis, followed by the proximal femur, proximal humerus, distal femur, and ribs 2 .…”

Chondrosarcoma pelvis, beyond the boundaries.

“…4 Chondrosarcoma is a cartilage matrix producing mesenchymal tumor with 20 -27% 0f primary malignant bone tumor. 5 There are many types of chondrosarcoma, with variable prognosis. 6 Enneking and Dunham classified pelvic tumor resection in 1978 as type-I ilium, type-II acetabulum and Type III pubis and ischium.…”