Avulsive cortical irregularity - "tug lesion"

Image Modality: 
Xray
Tumor Type: 
Tumor mimics
Benign/Malignant: 
Benign
Body Region: 
knee, thigh, distal femur, proximal tibia
Bone Name: 
femur
Location in bone:: 
metaphyseal
Position within Bone: 
cortical