among lymphoma entities initially falsely interpreted on pure morphological grounds were hodgkin 's disease , lymphoepithelioid cellular lymphoma , immunoblastic lymphoma with epithelioid cells , malignant histiocytosis , histiocytosis x , centroblastic lymphoma , undifferentiated carcinoma , and undifferentiated tumour .
C0024299
lymphoma
C0019829
hodgkin 's disease