Korean J Urol.  2006 Jan;47(1):105-107. 10.4111/kju.2006.47.1.105.

Extramedullary Plasmacytoma of the Retroperitoneum

• Chung JS
• Kang SC
• Kim YJ
• Choo GY
• Kim R
• Seong DH
• Yoon SM

• KMID: 2294225
• DOI: http://doi.org/10.4111/kju.2006.47.1.105

Abstract

Extramedullary plasmacytoma is an uncommon neoplasm and it occurs most frequently in the upper respiratory tract. Among the extramedullary plasmacytomas, retroperitoneal plasmacytoma is an extremely rare tumor with only about 10 cases having been reported in the world. Herein, we reported on a extramedullary plasmacytoma in the retroperitoneum. A 68-year-old man presented with left flank pain. The initial clinical diagnosis was retroperitoneal tumor. Retroperitoneal tumor mass excision along with left nephrectomy was performed and the histopathology showed plasmacytoma. There was no evidence of multiple myeloma. After the operation, he was treated with radiotherapy and the out-patient department follow-up is going on.

Keyword

Plasmacytoma; Retroperitoneal neoplasms

MeSH Terms

Aged
Diagnosis
Flank Pain
Follow-Up Studies
Humans
Multiple Myeloma
Nephrectomy
Outpatients
Plasmacytoma*
Radiotherapy
Respiratory System
Retroperitoneal Neoplasms

Figure

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  Fig. 1 Contrast-enhanced computed tomography reveals a huge retroperitoneal soft tissue tumor.

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  Fig. 2 There is a well demarcated multinodular mass at the medial side of the lower pole of the left kidney. On sectioning, the cut surface of the mass is multinodular with multifocal necrosis. The mass is tightly adhered to the kidney parenchyma, but direct invasion is not seen.

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  Fig. 3 Photomicrograph of the retroperitoneal tumor shows sheets of plasma cells having varying degrees of differentiation (hematoxylin and eosin, ×400).

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  Fig. 4 Diffuse, bright cytoplasmic staining for lambda light chain in the differentiated plasmacytoma of the retroperitoneum.

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  Fig. 5 Computed tomography of the abdomen demonstrates no evidence of recurred mass or distant metastasis.

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