title: Granulocytic sarcoma with translocation (9;11)(p22;q23): two cases.
abstract: Granulocytic sarcomas are localized deposits of myeloid leukemia cells that may precede or occur concurrently with disseminated disease. In either event, the origins of the cells comprising the malignancy are the same. Published reports of granulocytic sarcomas have described, in the majority of cases, a morphology typical of AML-M2 and the presence of the t(8;21)(q22;q21) typical of that FAB type. In a smaller number of cases, the inv(16)(p13q22) characteristic of AML-M4 has been recorded in cells with a myelomonocytic appearance. We report two patients with granulocytic sarcomas showing monocytic morphology in which the malignant cells showed t(9;11)(p22;q23) typical of AML-M5. This abnormality is seen in up to 7% of childhood AML, but has not previously been reported in granulocytic sarcoma. The detection of this cytogenetic abnormality facilitated the precise characterization of the malignant cells and selection of the most appropriate therapy, emphasizing the value of cytogenetic analysis in cases of granulocytic sarcoma.
authors.affiliation: Department of Human Genetics, University of Newcastle upon Tyne, United Kingdom.
authors.forename: N P
authors.initials: NP
authors.lastname: Bown
authors.forename: D
authors.initials: D
authors.lastname: Rowe
authors.forename: M M
authors.initials: MM
authors.lastname: Reid
mesh_terms: D000208:Acute Disease; D002869:Chromosome Aberrations / Q000235:genetics*; D002871:Chromosome Banding; D025063:Chromosome Disorders; D002881:Chromosomes, Human, Pair 12; D002891:Chromosomes, Human, Pair 21; D002898:Chromosomes, Human, Pair 8; D050676:Core Binding Factor Alpha 2 Subunit; D004268:DNA-Binding Proteins; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007951:Leukemia, Myeloid / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011518:Proto-Oncogene Proteins; D014157:Transcription Factors / Q000235:genetics; D014178:Translocation, Genetic / Q000235:genetics*
chemical_list: D050676:Core Binding Factor Alpha 2 Subunit; D004268:DNA-Binding Proteins; D011518:Proto-Oncogene Proteins; C493728:RUNX1 protein, human; D014157:Transcription Factors