Immunoglobulin D myeloma presenting as an extraosseous soft tissue tumor |
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Authors: | K Mochizuki Kunisuke Katayama Fumihito Kikuchi Ikuo Saito Masashi Homori |
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Institution: | (1) Department of Orthopaedic Surgery, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan, JP;(2) Department of Pathology, Kyorin University School of Medicine, Tokyo, Japan, JP;(3) Department of Hematology, Kyorin University School of Medicine, Tokyo, Japan, JP |
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Abstract: | We report a 69-year-old man who suffered an extraosseous tumor of immunoglobulin D myeloma (lambda type) in the shoulder girdle,
mimicking a primary soft tissue sarcoma. The tumor was isointense with adjacent muscle on T1-weighted MR images, and hyperintense
on T2-weighted images. No continuity with the neighboring bone was noted. After administration of gadolinium, the central
part of the tumor showed marked contrast enhancement. Although the tumor showed a complete response to the initial chemotherapy,
the patient died of the disease 31 months after its initial manifestation. Several bone marrow aspirations and biopsies of
the ilium and sternum had shown no increase in plasma cells (range 0.6–1.2%) until the disease became advanced 19 months after
its initial manifestation.
Received: 1 September 2000 Revision requested: 9 October 2000 Revision received: 11 November 2000 Accepted: 15 November 2000 |
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Keywords: | IgD myeloma Extraosseous soft tissue tumor Shoulder girdle MRI |
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