- Etiology: benign self-limited entity, stress related due to “tugging” on insertion of adductor magnus tendon / medial head of gastrocnemius
- Radiograph: lucent irregular saucer shaped lesion along contour of posteromedial aspect of distal femoral metaphysis which has reactive sclerosis
- MRI: low signal intensity of T1WI, high signal intensity on T2WI, enhances with contrast
- Clinical: Don’t touch lesion, most common at 10-15 years, often but not always bilateral, left > right, consider using the term “tug lesion” or “avulsive irregularity” rather than “cortical desmoid”, usually asymptomatic and found incidentally
Radiology Cases of Cortical Desmoid
