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. 2022 Mar 5;61(19):2891–2894. doi: 10.2169/internalmedicine.9170-21

Figure 4.

Figure 4.

Results of an immunohistochemical examination of the pericardium. Spindle cells were positive for smooth muscle actin (①), desmin (②), anaplastic lymphoma kinase (③), and Ki67 (④) and negative for CD31/CD34. These results did not contradict a diagnosis of an inflammatory myofibroblastic tumor.