Rosai–Dorfman disease following bone marrow transplantation for pre‐B cell acute lymphoblastic leukemia
2008
A child with acute pre-B cell lymphoblastic leukemia underwent haploidentical bone marrow transplantation (BMT) after first relapse. Approximately 8 months after the BMT, he developed a soft tissue mass overlying a defect in the left frontal bone. He was found to have several additional osteolytic lesions but no evidence of lymphadenopathy or organomegaly. A biopsy of the presenting lesion demonstrated a polymorphous infiltrate composed predominantly of S-100 protein and CD68 immunoreactive histiocytic cells. Together with the presence of emperipolesis, the process was interpreted as Rosai–Dorfman (R–D) disease. He received chemotherapy with vinblastine, prednisone, 6-mercaptopurine and methotrexate and has been in remission for over 4 years. Only one previous example of acute lymphoblastic leukemia in childhood has been reported with R–D disease. Pediatr Blood Cancer 2008;51:433–435. © 2008 Wiley-Liss, Inc.
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