title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 14-1973.
mesh_terms: D000368:Aged; D000741:Anemia, Aplastic / Q000150:complications / Q000175:diagnosis / Q000209:etiology / Q000473:pathology*; D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D013945:Thymoma / Q000150:complications / Q000175:diagnosis / Q000473:pathology*; D013950:Thymus Gland / Q000473:pathology; D013953:Thymus Neoplasms / Q000150:complications / Q000175:diagnosis / Q000473:pathology*