title: Imaging findings of primary gastric plasmacytoma: a case report.
abstract: Primary gastric plasmacytoma (GP) is a rare extramedullary plasmacytoma with clinical and imaging features that are common among other gastric tumors, such as gastric adenocarcinomas, gastric stromal tumors, and lymphomas. Here, we present a histologically conﬁrmed case of primary GP examined with biphasic computed tomography (CT), magnetic resonance imaging (MRI), and endosonography. A well-circumscribed extraluminal mass appearing as homogeneous attenuation/intensity with gradual enhancement was identified on biphasic enhancement CT and MRI. This mass was hyperintense on diffusion-weighted imaging and hypointense on the apparent diffusion coefficient map, implying that water diffusion in the mass was restricted. In addition, endosonography indicated a low echogenic mass in the gastric wall. These imaging findings increase the available knowledge about imaging of this disease and provide valuable information for differentiating primary GP from common gastric tumors.
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Zhen-Hua
authors.initials: ZH
authors.lastname: Zhao
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Yang
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Jin-Dao
authors.initials: JD
authors.lastname: Wang
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Wei
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.affiliation: Zhen-Hua Zhao, Jian-Feng Yang, Bo-Yin Wang, Department of Radiology, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing 312000, Zhejiang Province, China.
authors.forename: Bo-Yin
authors.initials: BY
authors.lastname: Wang
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D001706:Biopsy; D003952:Diagnostic Imaging / Q000379:methods*; D019160:Endosonography; D005773:Gastroscopy; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008297:Male; D064847:Multimodal Imaging; D010954:Plasmacytoma / Q000737:chemistry / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D011237:Predictive Value of Tests; D013274:Stomach Neoplasms / Q000737:chemistry / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D014408:Biomarkers, Tumor
keywords: Computed tomography, X-ray; Diffusion; Endosonography; Magnetic resonance imaging; Plasmacytoma; Stomach
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