대한흉부영상의학회 Korean Society of Thoracic Radiology

Discussion

Diagnosis With Brief Discussion

Diagnosis

Extramedullary plasmacytoma in mediastinum

Radiologic Findings

Fig 1. A chest PA view shows mediastinal widening and bilateral pleural effusions.
Figs 2-5. CT scans reveal a large, enhancing soft tissue mass involving the middle and posterior mediastinum. The mass encases the superior vena cava, right main and lobar pulmonary arteries, and the left main bronchus.
Figs 6-7. Fused PET/CT images show a moderately hypermetabolic lesion (SUVmax 7.4) in the mediastinum.

Brief Review

This case illustrates a rare presentation of a plasmacytoma predominantly involving the mediastinal lymph nodes mimicking a mediastinal lymphoma. It is necessary to exclude plasmacytomas formed in extramedullary locations from bone marrow lesions, as observed in multiple myeloma. More than 80% of tumors occur in the upper respiratory tract, such as the nasopharynx, paranasal sinuses, nasal cavity, oropharynx, and tonsils. In non

References

1. Masood A, Hudhud KH, Hegazi A, Syed G. Mediastinal plasmacytoma with multiple myeloma presenting as a diagnostic dilemma. Cases J 2008;1:116.
2. Miyazaki T, Kohno S, Sakamoto A, Komori K, Sasagawa I, Futagawa S, et al. A rare case of extramedullary plasmacytoma in the mediastinum. Intern Med 1992;31:1363

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