Definition: Adenochondroma is a rare and benign benign tumor of the adenoma type that is usually located in the upper third of the chest wall. The tumor is composed of cartilaginous chondrocytes arranged in a 2-dimensional pattern. It does not require treatment and is generally asymptomatic, but some cases may present with swelling or pain. Adenochondroma is typically benign and not malignant, and there is no known risk factor for developing cancer.
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