Granulocytic sarcoma of the ileum treated by bone marrow transplantation.

An 8-year-old boy with a granulocytic sarcoma of the proximal ileum metastatic to mesenteric lymph nodes was placed into complete remission with surgical excision of the primary tumor and conventional induction chemotherapy with daunorubicin and cytosine arabinoside. He was then treated with high dose cytosine arabinoside, fractionated total body irradiation, and allogeneic marrow transplantation from his 22-month-old brother who was completely matched at the major histocompatibility complex. Methotrexate was given following the transplant to prevent graft-versus-host disease (GVHD). His post-transplantation course was complicated by a transient autoimmune hemolytic anemia related to an ABO blood group incompatibility and hepatic fungal microabscesses which responded to Amphotericin therapy. Four years following the transplant the patient remains in complete remission. The prognosis for patients with granulocytic sarcoma has been poor although, perhaps, improved over the past decade. This is the first published case report of successful treatment of a granulocytic sarcoma of the ileum by allogeneic marrow transplantation.