Purpose of the study: Medullary osteoid osteoma is exceptional. We report one case.
Patient: A 15-year-old patient presented osteoid osteoma localized in the medullary canal of the tibial shaft, associated with intense medullary and cortical hyperosteosis.
Discussion: The origin of the osteogenesis in medullary osteoid osteoma could be a localized hemodynamic change involving venous congestion with stimulation of periosteal venous drainage.