PMC7368202_01
CT scan brain showing soft tissue mass in right temporal area under the skin not involving bone and brain.
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fig1
It had an indistinct interface with adjacent temporalis muscle (Figure 1).
Microscopic appearance of inflammatory myofibroblastic tumor. Spindle cells with inflammatory cells.
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fig2
He was diagnosed as inflammatory myofibroblastic tumor based on histopathological evaluation.  Figure 2.
PMC7368202_02
Immunohistochemical staining showing ALK Positivity.
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fig3
ALK and CK showed strong diffuse staining in spindle cells. As shown in Figure 3, all these findings were consistent with inflammatory myofibroblastic tumor.