PMC2831462_01
Sagittal T1 (a), T2* (b) weighted images depict a fusiform mass over the Achilles tendon. Postcontrast sagittal T1 (c) and axial fat-saturated T1-weighted images demonstrate a moderate and homogeneous enhancement.
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fig1
It was isointense on T1-weighted images and hyperintense on T2*-weighted images and showed homogeneous moderate enhancement after intravenous gadolinium injection (Figure 1).
Neoplastic proliferation of differentiated plasma cells. Immunochemistry was positive for CD138 (plasma cell marker) and negative for CD20 (accompanying B-lymphocytes) and CD3 (accompanying T-lymphocytes).
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fig2
These findings supported the diagnosis of plasmacytoma (Figure 2). The presence of any other abnormality was ruled out by subsequent haematological study (bone marrow biopsy, complete blood count and electrophoresis) and PET-CT examination.