Abstract
Periosteal chondrosarcoma is an extremely rare low-grade malignant cartilaginous tumor arising from the external bone surface. Diagnosis of periosteal chondrosarcomas may be challenging, since this condition closely resembles periosteal chondromas. It has been reported that positron emission tomography (PET) is useful in distinguishing benign from malignant cartilaginous tumors using a maximum standardized uptake value (SUVmax) cut-off of 2.0 or 2.3. This report presents the case of a 40-year-old female with an 18-month history of a tender mass in the left distal femur. Radiological findings demonstrated periosteal buttressing. Magnetic resonance imaging (MRI) revealed a chondrogenic tumor of 3 cm in size developing from the external bone surface. It was difficult to differentiate periosteal chondrosarcoma from periosteal chondroma on the basis of size and the radiological and MRI findings. PET/computed tomography (CT) revealed abnormal linear uptake with an SUVmax of 2.7, indicating a malignant tumor. A diagnosis of periosteal chondrosarcoma was made, and wide resection was performed. Tumor histology was consistent with grade II chondrosarcoma. PET/CT is thus useful in differentiating periosteal chondrosarcoma from periosteal chondroma.
Highlights
Periosteal chondrosarcoma is an extremely rare and low‐grade malignant cartilaginous tumor arising from the external surface of bones [1], and it accounts for
The present study reports a case of femoral periosteal chondrosarcoma that was diagnosed by positron emission tomography (PET)/computed tomography (CT)
Magnetic resonance imaging (MRI) findings indicated a chondrogenic tumor at the external bone surface, which again suggested a periosteal chondroma or a periosteal chondrosarcoma (Fig. 3)
Summary
Periosteal chondrosarcoma is an extremely rare and low‐grade malignant cartilaginous tumor arising from the external surface of bones [1], and it accounts for
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have