Although mucocele of the paranasal sinuses is rather common, it is rarely seen in maxillary sinuses. If the maxillary sinus is involved, it is presented with destruction of the sinus wall, swelling of the cheek, swelling of the g i ngivobuccal sinus, expansion to the inferior wall of the orbit, and ophtalmic presentation. In this case report a rare and noticeable case with maxillary sinus mucocele is presented. The case was first diagnosed with suspicious sinus malignancy based on CT scan but during the surgery the cyst was found to be a mucocele.

  Extramedullary plasmacytomas are rare solitary soft tissue tumors that arise from proliferations of malignant transformed monoclonal plasma cell. Though they are closely related to multiple myelomas, they have better prognosis. The tumor is eradicated by surgery or local radiation therapy. This is a case-report study of solitary plasmacytoma tumor which involved left side maxillary sinus and underwent excisional biopsy confirmed by IHC.