thymoma type A https://www.malacards.org/card/spindle_cell_thymoma https://www.malacards.org/card/thymoma_type_a spindle cell thymoma ICDO:8581/1 UMLS:C1266091 medullary thymoma DOID:3279 GARD:0020892 A thymic epithelial neoplasm characterized by the presence of spindle and/or oval neoplastic epithelial cells. Lymphocytic infiltration is minimal or absent. It may be associated with myasthenia gravis or pure red cell aplasia. The majority of cases occur in the anterior mediastinum as Masaoka stage I tumors. Approximately 20% of the cases occur as stage II or stage III tumors. Type A thymoma generally behaves as a benign tumor and the overall survival is reported to be 100% at 5 and 10 years. Orphanet:263310 thymoma type A NCIT:C6454 primary thymic epithelial neoplasm type A MONDO:0002588 primary thymic epithelial tumour type A primary thymic epithelial tumor type A MEDGEN:266099 thymoma