結膜下骨軟骨腫：2例の小児患者における記述と外科的管理

Choristomas are benign, normal tissues that grow in an abnormal location, with osseous choristomas being the rarest. In this report, we present the diagnosis and treatment of two patients with subconjunctival lesions that extended to the lateral eyelid, causing eyelid distortion. A decision for surgical intervention was made, and pathological analysis was performed, which was most consistent with osseous choristoma. We present the diagnosis, surgical management, and pathological analysis of two of the rarest conditions.