case_images: PMC7498961_01
case_images: Whole body positron emission tomography showing patchy thoracolumbar marrow
  uptake, with focal increased uptake in the left lateral aspect of the L2
  vertebral body seen in the sagittal cut (A), frontal cut (B), and axial cut
  (C).
case_images: 10.1177_2324709620959997-fig1.jpg
case_images: PMC7498961_01_10.1177_2324709620959997-fig1.jpg
case_images: fig1-2324709620959997
case_images: Following his first discharge from our facility, outpatient positron emission tomography (PET) was performed, which showed patchy thoracolumbar marrow uptake with increased focal uptake of the left lateral aspect of the L2 vertebral body (Figure 1).
case_images: (A) Low-power (200x magnification) hematoxylin and eosin (H&E) section
  demonstrating intravascular involvement by B-cell lymphoma. (B) High-power
  (600x magnification) H&E section showing atypical B-cells with open
  chromatin and prominent nucleoli within intravascular space.
case_images: 10.1177_2324709620959997-fig2.jpg
case_images: PMC7498961_01_10.1177_2324709620959997-fig2.jpg
case_images: fig2-2324709620959997
case_images: He then underwent a vertebral body biopsy, which was highly suspicious for involvement of a B-cell neoplasm, prompting a repeat bone marrow biopsy, which showed a large B-cell lymphoma exclusively involving the vasculature and with low level (less than 1%) marrow involvement (Figure 2).