Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.

Definition of Bone cyst, simple

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Bone cyst, simple: A solitary fluid-filled cavity (cyst) in a bone, usually in the shaft of a long bone, especially the humerus, in a child. A simple bone cyst can cause pain in or near the bone. Also known as unicameral bone cyst and solitary bone cyst.

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