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Int J Clin Exp Pathol 1(5): 448-456;2008

Case Report
The 8p11 Myeloproliferative Syndrome: Review of Literature and an Illustrative Case

Ami Goradia, Michael Bayerl and Dennis Cornfield

Department of Pathology, Hospital of the University of Pennsylvania, Philadelphia, PA; Department of Pathology, Penn State / Hershey Medical
Center, Hershey, PA and Department of Pathology, Health Network Laboratories/Lehigh Valley Hospital, Allentown, PA.

Received 25 Oct 2007; accepted and available online 1 January 2008

Abstract: The 8p11 myeloproliferative syndrome (EMS), also called stem cell leukemia/lymphoma (SCLL), is a relatively rare condition
characterized in its typical form by the occurrence, either simultaneously or sequentially, of a bcr/abl-negative myeloproliferative disorder and a
lymphoma, usually a precursor T lymphoblastic lymphoma. The disease most often terminates in acute myeloid leukemia which is resistant to
conventional chemotherapy. The defining cytogenetic abnormality, a translocation at the 8p11 locus, always involves the fibroblast growth factor
1 (
FGFR1) gene. To date, eight partner genes have been identified in association with FGFR1 rearrangements. The most frequent FGFR1
translocation partner is the zinc finger gene
ZNF198 located at 13q11. The t(8;13)(p11;q11) disrupts intron 8 of the FGFR1 gene and fuses
proline-rich and zinc finger domains of the
ZNF198 gene with the cytoplasmic tyrosine kinase domain of FGFR1. Oligomerization of the fusion
protein occurs, with subsequent activation of downstream signal transduction pathways, culminating in neoplastic cell transformation. This
review describes the historical development of the EMS/SCLL and outlines its cytogenetic abnormalities and molecular mechanisms with an
illustrative cas. (IJCEP710009).

Key Words: 8p11 myeloproliferative syndrome, stem cell leukemia/lymphoma, FGFR1

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Address all correspondence to: Ami D. Goradia MD, Dept. of Pathology & Laboratory Medicine, Hospital of the University of Pennsylvania, 3400
Spruce Street, 6 Founders Pavilion, Philadelphia, Pennsylvania 19104; pager (215) 374 - 4317, fax (215) 662 - 7742, Email: