Osteoid Osteoma in Children Younger than 3 Years of Age.

We present a case series of four children, younger than 3 years old, with osteoid osteoma of the lower limb. Pain and limping were the main symptoms. With careful clinical examination, we could localize the affected area. Radiological evaluation revealed cortical thickening in 3 children. On MRI examination, we found extensive edema, with normal bony cortices. The central nidus was found in 3 children. CT scan was the most accurate examination which revealed the central nidus with surrounding sclerosis. Bone scans had positive uptake in the affected area. Our patients were treated with an intralesional excision biopsy, with simultaneous radiofrequency ablation in those affected in the femur. Pathological specimens confirmed the diagnosis of osteoid osteoma. There was uneventful recovery of our patients. This case series contributes to the limited description of osteoid osteoma diagnosed and treated in very young children.

Melorheostosis in an Adolescent with Limb Length Discrepancy and Management with Epiphysiodesis with Eight Plates.

INTRODUCTION: Melorheostosis is a rare bone dysplasia. It is mainly a radiographic diagnosis with distinct findings of endosteal or periosteal sclerosis along the axis of long bones, resembling the flowing wax. It is usually polyostotic and monomelic. Clinical manifestations are pain, limitation of joint movements, deformities, and contractures. Leg length discrepancy may be found, usually the affected limb being shorter. CASE PRESENTATION: We present an adolescent boy, with melorheostosis of the lower limb. The affected limb was longer with equally divided discrepancy of the femur and tibia. There were no another symptoms. After a thorough investigation, we performed epiphysiodesis both medial and lateral of the distal femoral and proximal tibial growth plate, using8eight plates. At the end of the growth, there was almost complete equalization of the length of his lower limbs. CONCLUSION: Melorheostosis may be present with leg length discrepancy leg length discrepancy, with an exception, being that the affected limb is longer. Epiphysiodesis with eight plates is an effective method of limb length equalization.