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Representative cases of ALCL tumors analyzed for LOH using the GeneScan and Genotyper software. A: An ALK-positive ALCL tumor with LOH of the 13q14 locus assessed with the D13S153 microsatellite marker. The expected size of the alleles (212 and 236) is shown. B: An ALK-negative ALCL tumor with heterozygous 13q32 locus assessed with the D13S274 microsatellite marker that served as a control. The expected size of the alleles (208 and 216) is shown.
