Donor cell-derived chronic myeloproliferative disease with t(7;11)(p15;p15) after cord blood transplantation in a patient with Philadelphia chromosome-positive acute lymphoblastic leukemia

• Published in: International journal of hematology Vol. 86; no. 2; pp. 192 - 195
• Main Authors: Mitsui, Hideki, Nakazawa, Tsuyoshi, Tanimura, Akira, Karasuno, Takahiro, Hiraoka, Akira
• Format: Journal Article
• Language: English
• Published: Japan Springer Nature B.V 01.08.2007
• Subjects: Adult; Chromosomes, Human, Pair 11; Chromosomes, Human, Pair 7; Chronic Disease; Cord Blood Stem Cell Transplantation - adverse effects; Humans; Infant; Male; Myeloproliferative Disorders - etiology; Myeloproliferative Disorders - genetics; Precursor Cell Lymphoblastic Leukemia-Lymphoma - complications; Precursor Cell Lymphoblastic Leukemia-Lymphoma - therapy; Tissue Donors; Translocation, Genetic
• ISSN: 0925-5710; 1865-3774
• DOI: 10.1532/IJH97.06162

We report a case of donor cell-derived chronic myeloproliferative disease with t(7;11)(p15;p15) occurring after cord blood transplantation (CBT). A 41-year-old man developed precursor B-cell acute lymphoblastic leukemia with a karyotype of 46, XY, t(9;22)(q34;q11) and inv(9)(p11;q13), for which he received CBT from a sex-mismatched donor at the first complete remission of the leukemia. Five months after CBT, gradual neutrophilia of unknown origin developed following the myeloid reconstitution after CBT. Karyotyping of bone marrow cells at 9 months after CBT showed 46, XX, t(7;11)(p15;p15) in 17/20 dividing cells, but neither Philadelphia chromosome (Ph) nor inv(9)(p11;q13) was present. This is the first report of chronic myeloproliferative disease with t(7;11)(p15;p15) that developed in donor cells after CBT. The donor was well-developed and healthy, at least at the time of follow-up, half a year after the birth.