Nodular hyperplasia presenting as a mediastinal mass: Three case reports
2018
RATIONALE: Based on imaging and biopsy results, surgical removal of mediastinal nodular hyperplasia (MNH) may be unnecessary, and mediastomy may be avoidable. PATIENT CONCERNS: We report three cases of nodular hyperplasia presenting as a mediastinal mass on imaging studies during a health check-up or for the evaluation of known abscess in the right masticator and submandibular spaces. INTERVENTIONS: In the first two cases, surgical excision was performed, and in the third case, US-guided core needle biopsy was performed. DIAGNOSES: Histopathological examination revealed MNH in the first two cases, and histologic examination suggested MNH. OUTCOMES: In the first two cases, there were no associated complications after successful surgical removal. In the third case, surgery was not performed because of old age and no associated symptoms. LESSONS: MNH may mimic mediastinal tumors on imaging studies. Accordingly, awareness of imaging features, interval changes, associated symptoms, and biopsy results may be necessary for the appropriate management of MNH.
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