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Cancer Genet Cytogenet. 1999 Jan 15;108(2):141-3.

Plexiform fibrohistiocytic tumor with a clonal cytogenetic anomaly.

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Department of Pathology, University of New Mexico School of Medicine, Albuquerque 87131, USA.


Plexiform fibrohistiocytic tumors are rare lesions of proposed myofibroblastic origin occurring primarily in infants and children. There is a characteristic biphasic histology comprised of both fibroblastic and histiocyte-like components. These tumors tend to be locally aggressive with prognosis dependent on completeness of resection. A previous cytogenetic case report of this tumor described a stemline clone with a karyotype of 46,XY,-6,-8, del(4)(q25q31),del(20)(q11.2),+der(8)t(8;?) (p22;?),+mar. We report a different cytogenetic finding in another plexiform fibrohistiocytic tumor which demonstrated a simpler karyotype of 46,XY,t(4;15)(q21;q15). The implications of cytogenetic heterogeneity in fibroblastic tumors is briefly discussed.

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