Figure 1.

Clinical findings in a patient with diffuse large B-cell lymphoma (DLBCL) and interdigitating dendritic cell sarcoma (IDCS). (A) FDG PET/CT scans at diagnosis (left), at relapse (center), and after transplantation (right). (B) Hematoxylin-eosin staining (original magnification ×200) and immunostaining of tumors. (C) DLBCL and IDCS cells show identical clonal peaks according to PCR for the immunoglobulin heavy chain (IGH) gene. Primers for IGH variable framework region 2 and joining region were used. (D) Fluorescent in situ hybridization using MYC break apart probes demonstrates splitting of MYC gene signals (arrows) in DLBCL and IDCS cells.