PMC3977154_01
Bruise-like lesion on left side of thoracic vertebrae.
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fig001
Physical examination revealed a 4 cm nodular, raised bruise like lesion (Figure 1).
Bone marrow trephine showing medium sized cells with polymorphic, angulated nuclei with moderately basophilic chromatin and scant eosinophilic cytoplasm. Morphologically these cells resemble atypical lymphocytes. Mitoses are numerous (H&E, 63x).
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fig002
Bone marrow was markedly hypercellular with a diffuse infiltrate of large atypical lymphoblastoid cells displaying prominent nuclear folding and scant esinophilic cytoplasm (Figure 2).