ABSTRACT
Objective and Importance: The authors reported a case of plasmocytoma involving the Cerebellopontine plasmocytoma. Clinical presentation: The patient was a 55-years-old woman who complained of vertigo and tinnitus for one year before admission, Neurologial examination showed impairement of cerebellar test. CT scan revealed a large mass lesion in the left CPA region. Intervention: The patient underwent a left retromastoid craniectomy and resection of the tumor. Histopathological studies of biopsy revealed plasmocytoma. Other studies, including bone isotope scan and bone marrow aspiration, did not show involvement of other parts of the body. Within 6 months of follow up there was no sign of progression of the tumor in CT scan. There are few reports of CPA solitary plasmocytoma. There is a potential risk for error in diagnosis in imaging and pathology. The current treatment is subtotal or radical resection combined with radiotherapy