Muppet gratefully acknowledges the contribution of his good friend Dr. Manel Escobar who discovered and diagnosed the following case:
An 11-year-old girl with migrating bone pain for the last year, with normal radiographs, now presents with one month of low-degree fever. Chest and abdominal CT were unremarkable, except for the pelvic findings.
1. Fibrous dysplasia
2. Langerhans cell histiocytosis
4. None of the above