PMC6297258_01
Large indurated violaceous plaques over sternotomy scar. A, Before and B, after treatment with chemotherapy.
gr1.jpg
PMC6297258_01_gr1.jpg
fig1
An 86-year-old African-American man presented with 2 large pink-red to violaceous plaques on the lower chest (Fig 1, A) and a palpable subcutaneous right medial thigh mass. He experienced complete clinical resolution of the chest plaques (Fig 1, B) and subcutaneous right medial thigh mass.
Chest CT. Lobulated soft tissue subcutaneous mass identified in the lower anterior chest wall along the incision line of previous sternotomy (L, left; P, posterior).
gr2.jpg
PMC6297258_01_gr2.jpg
fig2
Computed tomography (CT) scan found multiple lobulated soft tissue subcutaneous masses in the lower anterior chest wall along the incision line of previous sternotomy with the dominant mass 5.7 x 5.7 x 7.5 cm (Fig 2).
Plasmacytoma. A, Pleomorphic atypical plasma cells in the dermis with some clock-face nuclei and moderate cytoplasm. B, There is strong staining with antibodies against CD138. C, The cells stain with lambda by in situ hybridization and do not stain with kappa (not shown) by qualitative in situ hybridization. (A, Hematoxylin-eosin stain; B, CD138 stain; C, lambda stain; original magnifications: A, x40; B and C, x100.)
gr3.jpg
PMC6297258_01_gr3.jpg
fig3
The cells stained strongly with antibodies against CD138 and stained with lambda by in situ hybridization but did not stain with kappa (Fig 3).