We report a case of chondroma on the popliteal region. A 37 year-old man presented a soft mass on the popliteal fossa. The mass was located on the left popliteal fossa measuring 6×4×3cm. MRI revealed low intensity on T1 weighted images and high intensity lesion on T2* weighted inages. The tumor was located between the semimembranosus and medial head of gastrocnemius muscles. All specimens showed typical characteristics of chondrocytes and hyaline cartilage.
Histopathological diagnosis was Chondroma. After resection of the tumor, whitish tumors the size of a grain of rice were found in the left knee joint. The origin of the tumor was thought to be synovial chondromatosis or paraarticular chondroma.
