Ollier's Disease of the Iliac Bone with Sacroiliac Joint Involvement in an Adolescent Patient.

Ollier's disease of the hip bone involving the sacroiliac joint has not yet been reported in the English-language literature in both the mature and immature skeletons. The authors present such a unique case in an adolescent girl that posed a significant diagnostic challenge secondary to the rarity of the lesion and atypical clinical picture.