We present a case of periosteal ganglion in the distal metaphysis of the femur, in a 50 years old woman, which was confirmed by the surgery. Radiograms showed the cortical erosion and spicula formation mimicing the malignant bone tumors. However, no increased uptake was seen in the lesion by 99mTc-MDP scintigraphy. MRI suggested periosteal ganglion from the findings of its periosteal location and the content of low signal intensity in T1 and high signal intensity in T2.
Those findings have been discussed on the points of the image diagnosis.
