Oral Pathology Diagnosis

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Eruption hematoma. Often associated with an erupting primary tooth, these benign lesions are the result of hemorrhage into the cystic cavity surrounding the crown of the involved tooth.The lesion typically resolves on its own with the eruption of the underlying tooth. Rarely is it necessary to excise the roof of the cyst to allow for eruption of the involved root.

Source: Kline MW. Rudolph's Pediatrics, 23e; 2018.