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Table 2 Differential diagnosis of meningioma: immunohistochemical findings [16, 19, 20]

From: Extracranial meningiomas concurrently found in the lung and vertebral bone: a case report

Antibody Meningioma Leiomyoma Thymoma (spindle cell type) Solitary fibrous tumor
Anti-epithelial membrane antigen +
Anti-vimentin + + + +
Anti-S100 antigen Occasionally
+
Anti-alpha smooth muscle actin + Rarely
+
CD34 +
Anti-pan-cytokeratin (AE1/AE3) +