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- W2065848008 abstract "Sir, Plasmacytoma may be osseous (medullary) or nonosseous (extramedullary) and primary or secondary to disseminated multiple myeloma (MM). The skull base is one of the rarest sites of solitary plasmacytoma of the bone.[1] We present here a rare case of a patient with skull base plasmacytoma as the presenting sign of MM. A 58-year-old man with hypertension presented with a 3-month history of left-sided hearing loss, vertigo, and headache. On examination, there was left-sided sensory neural deafness. Laboratory tests showed normal hemogram, electrolytes, as well as renal and liver function. A possibility of cervical spondylosis was considered. Head and cervical spine magnetic resonance imaging [Figure 1] revealed destruction of the clivus that was replaced by a moderately enhancing mass lesion, which was hypointense on unenhanced T1-weighted images and iso- to hypointense on T2-weighted images. Laterally, the lesion infiltrated both petrous apices, mostly on the left side, infiltrating the left jugular bulb and extending posterolaterally up to the left sigmoid sinus in the left cerebellopontine angle cistern. Computed tomography of Head [Figure 2] showed an osteolytic lesion with areas of spotty calcification. Skeletal radiological work-up was normal. A transnasal biopsy of the lesion showed plasmacytoma of the bone [Figure 3]. b2-Microglobulin was 2373.0 ng/mL and serum protein electrophoresis did not reveal M-band. Urine was negative for Bence Jones proteins. Peripheral smear was normal. A bone marrow aspiration study showed 41% of atypical plasma cells, binucleate forms, and plasma blast, suggestive for MM. The patient was treated with 6 cycles of high dose dexamethasone (40 mg/d intravenously for 4 d/cycle) and thalidomide (200 mg/d orally for 28 d/cycle), and local irradiation (40 Gy 20 fractions over 4 wk). After completion of this treatment, he has been referred for bone marrow transplantation.Figure 1: Head and cervical spine magnetic resonance imagingFigure 2: Computed tomography scan of the patient's headFigure 3: Bone marrow aspirate stained with Giemsa stain (magnification, x600)Plasma cell neoplasm included MM, monoclonal gammapathies of unknown significance, plasmacytomas, and plasma cell leukemia.[2] MM is the most common type of plasma cell neoplasm. Plasmacytoma represents a local form of plasma cell neoplasm.[3] Plasmacytomas represent less than 1% of all head and neck tumors.[4] Primary extramedullary plasmacytomas represent less than 4% of all plasma cell tumors, most often involving the upper aerodigestive tracts and paranasal sinuses.[45] Solitary intracranial plasmacytoma is exceedingly rare,[6] and may arise from the skull, leptomeninges, or the brain. When the skull is involved, most of the plasmacytomas occur in the calvarium and the skull base is rarely affected. Here, they may occur in the clivus, such as in the case presented herein, or in the petrous apex. In conclusion, this is a rare clinical presentation since the patient did not have any other features of MM and it highlights the importance of extensive evaluation of patients with atypical neurological symptoms." @default.
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- W2065848008 date "2010-01-01" @default.
- W2065848008 modified "2023-10-03" @default.
- W2065848008 title "Unusual presentation of multiple myeloma" @default.
- W2065848008 doi "https://doi.org/10.4103/0019-509x.64709" @default.
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