Case 329

 A twelve-year-old female presented in our hospital for 4 cm-sized mass at left parietal bone. She realized it 3 weeks before. This morning, she realized another painful nodule of 2cm at the portion behind left ear. She took CT for further information (Figs 1-3).

What is your imaging diagnosis ?

1.　Metastatic tumor

2.　Osteosarcoma

3.　Ewing tumor

4.　Langerhans cell histiocytosis

5.　Osteomyelitis

answer

2024.3.29