Plasmacytoma of the petrous temporal bone.Extramedullary plasmacytoma is a rare soft-tissue malignancy of plasma cells Plasma cells
A type of white blood cell.
Mentioned in: Bence Jones Protein Test . Some 80% of these tumors occur in the head and neck, 28% in the nasal cavity, and 22% in the paranasal sinuses. (1,2) Approximately 20% of the head and neck tumors are initially associated with multiple myeloma. (1)
We evaluated a 41-year-old woman who had a history of multiple cranial cranial /cra·ni·al/ (-al)
1. pertaining to the cranium.
2. toward the head end of the body; a synonym of superior in humans and other bipeds.
adj. neuropathies on the right, particularly in the trigeminal nerve. Computed tomography (CT) detected a soft-tissue mass that involved the petrous portion of the right temporal bone and extended into the posterior right parasellar area (figure). Biopsy identified the lesion as a plasmacytoma, and the patient underwent local radiation therapy.
Plasmacytoma has been reported to involve the temporal bone and produce a lytic lytic /lyt·ic/ (lit´ik)
1. pertaining to lysis or to a lysin.
2. producing lysis.
1. Of, relating to, or causing lysis.
2. lesion of fairly homogeneous soft-tissue density (because of its cellularity), and it can be seen on both CT and magnetic resonance imaging magnetic resonance imaging (MRI), noninvasive diagnostic technique that uses nuclear magnetic resonance to produce cross-sectional images of organs and other internal body structures. . (2,3) Although plasmacytoma can occur as an isolated lesion, many patients eventually develop multiple myeloma. (1)
(1.) Som PM, Brandwein MS. Tumors and tumor-like conditions. In: Som PM, Curtin HD, eds. Head and Neck Imaging. Vol. 1, 4th ed. St. Louis: Mosby. 2003:261 373.
(2.) Chiang SK, Canalis RF, Ishiyama A, et al. Plasmacytoma of the temporal bone. Am J Otolaryngol 1998;19:267-73.
(3.) Dazert S, Baier G, Aletsee C, Hagen R. [Extramedullary plasmacytoma--manifestation in petrous petrous /pet·rous/ (pet´rus) resembling a rock; hard; stony.
1. Of stony hardness.
2. bone]. Laryngorhinootologie 1997;76:559-61.
From the Department of Radiology, Hospital Angeles, Mexico City (Dr. Ruenes), and the Department of Radiology, Louisiana State University Louisiana State University and Agricultural and Mechanical College, generally known as Louisiana State University or LSU, is a public, coeducational university located in Baton Rouge, Louisiana and the main campus of the Louisiana State University System. Health Sciences Center, New Orleans (Dr. Palacios).