title: A Cryptic t(11;14) Translocation in Mantle Cell Lymphoma Highlights the Importance of FISH.
abstract: Mantle cell lymphoma (MCL) is a mature B-cell neoplasm composed of monomorphic small to medium-sized atypical lymphocytes arising from naïve mantle zone B-cells, with a generally aggressive and incurable clinical course. The t(11;14)(q13;q32) between IGH@ and CCND1 is present in almost all cases of MCL. Secondary cytogenetic abnormalities are common, and have been associated in some cases with clinical progression. Variant and cryptic t(11;14) translocations have been reported as well. Herein, we present the case of an 80-year old woman with classical MCL, and a cryptic t(11;14) translocation detected by fluorescence in situ hybridization (FISH), and not by conventional cytogenetics. FISH on previously G-banded metaphases showed a cryptic CCND1-IGH@ fusion signal on a derivative chromosome 10, and another fusion signal on one of the abnormal copies of chromosome 11. Cases such as this highlight the importance of FISH studies as part of an algorithmic and multidisciplinary approach to diagnosis.
authors.affiliation: Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA.
authors.forename: Michael E
authors.initials: ME
authors.lastname: Kallen
authors.affiliation: Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA.
authors.forename: Yeun
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA.
authors.forename: Lynn
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA.
authors.forename: Nagesh P
authors.initials: NP
authors.lastname: Rao
authors.affiliation: Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Tirado