title: Translocation t(12;22)(q13;q12.2-12.3) in a clear cell sarcoma of tendons and aponeuroses.
abstract: Cytogenetic analysis of a short-term culture from a clear cell sarcoma revealed a complex karyotype with the mainline of 49,XY,t(7;18)(p11.2;q21.3), +der(7)t(7;18)(p11.2;q21.3), +8, +der (8;17)(q10;q10),t(12;22)(q13;q12.2-12.3),add(13)(p13). An apparently identical translocation t(12;22) has been described recently in four clear cell sarcomas, indicating that this constitutes a primary cytogenetic change specific for this type of tumor. In our case, the breakpoint on chromosome 22 could be assigned to band 22q12.2 or 22q12.3. Together with the present case, trisomy or tetrasomy 8 has been found in six of nine clear cell sarcomas, suggesting that, as in Ewing's sarcoma and myxoid liposarcoma, trisomy/tetrasomy 8 represents a nonrandom secondary aberration. We conclude that the finding of the specific translocation t(12;22) may prove to be an important marker in the differential diagnosis of clear cell sarcoma from some other soft tissue sarcomas and malignant melanoma.
authors.affiliation: Cytogenetics Research Laboratory, Roswell Park Cancer Institute, Buffalo, New York.
authors.forename: K
authors.initials: K
authors.lastname: Mrózek
authors.forename: C P
authors.initials: CP
authors.lastname: Karakousis
authors.forename: C
authors.initials: C
authors.lastname: Perez-Mesa
authors.forename: C D
authors.initials: CD
authors.lastname: Bloomfield
mesh_terms: D000328:Adult; D002881:Chromosomes, Human, Pair 12 / Q000648:ultrastructure*; D002892:Chromosomes, Human, Pair 22 / Q000648:ultrastructure*; D002999:Clone Cells / Q000648:ultrastructure; D003937:Diagnosis, Differential; D005354:Fibrosarcoma / Q000175:diagnosis; D005534:Foot Diseases / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D005819:Genetic Markers; D006801:Humans; D007621:Karyotyping; D008297:Male; D009442:Neurilemmoma / Q000175:diagnosis; D012509:Sarcoma / Q000175:diagnosis / Q000235:genetics*; D013584:Sarcoma, Synovial / Q000175:diagnosis; D013710:Tendons; D014178:Translocation, Genetic
chemical_list: D005819:Genetic Markers