title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 25-1977.
mesh_terms: D000328:Adult; D003884:Dermoid Cyst / Q000175:diagnosis / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008067:Lipoma / Q000175:diagnosis; D008479:Mediastinal Neoplasms / Q000175:diagnosis / Q000473:pathology*; D013724:Teratoma / Q000175:diagnosis / Q000473:pathology*; D013953:Thymus Neoplasms / Q000175:diagnosis