Typical findings include meningothelial whorls with immunoreactivity for epithelial membrane antigen (EMA) and vimentin, frequent progesterone receptor (PR) positivity, and strong somatostatin receptor 2A (SSTR2A) expression, features that help distinguish PPM from metastatic intracranial meningioma and other spindle-cell tumours [5,9]. This evidence concerns the gene PGR and spindle cell neoplasm.