In addition to plasmacytoma, I would do immunohistochemical stains to make sure this is not a diffuse large B cell lymphoma. Rarely, poorly differentiated carcinoma and sarcoma of various origins/types may appear plasmacytoid, so cytokeratins stain is also needed.
In addition to plasmacytoma, I would do immunohistochemical stains to make sure this is not a diffuse large B cell lymphoma. Rarely, poorly differentiated carcinoma and sarcoma of various origins/types may appear plasmacytoid, so cytokeratins stain is also needed.