1. Fletcher CDM, Bridge JA, Hogendoorn PCW, et al editors. WHO classification of tumours of soft tissue and bone. Lyon: IARC Press; 2013.
2. Fletcher CD, Unni KK, Mertens F, et al editors. World health organization classification of tumours: tumours of soft tissue and bone. Lyon: IARC Press; 2002.
3. Weiss SW, Enzinger FM. Malignant fibrous histiocytoma: an analysis of 200 cases. Cancer. 1978;41:2250–66.
4. Kabashima A, Kimura K, Sanefuji K, et al. A case of primary gastric undifferentiated high-grade pleomorphic sarcoma diagnosed with chief complaint of fever: a case report and literature review. Surg Case Rep. 2017;3:41.
5. Oguri Y, Cho H, Oohinata R, et al. Aggressive undifferentiated pleomorphic sarcoma of the stomach involving long-term survival: a case report and literature review. Mol Clin Oncol. 2018;9:661–5.