Osteoid Osteoma

Image 42

An osteoid osteoma is a benign bone tumor that is most commonly seen in the femur or tibia prior to adolescence.    

• Pain is worse at night and responds dramatically to aspirin.
  
• Failure to respond to aspirin usually rules out the diagnosis.
• May require CT scan or bone scan to demonstrate: a central nidus is seen in 75% of patients with an osteoid osteoma
  
• These require surgical removal so a referral is a must 

---

CT

Image 43

MRI

Image 44

(20)

Back to Other                                                                                                                                                                                                  Back to Differential Diagnosis Map