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Genotype analysis and PCR for Y- and X-chromosomes in PSTTs. White- and light-gray-shaded boxes: novel alleles present in the tumor; dark gray boxes: loss of maternal alleles in the tumor. P, PSTT; N, normal uterine tissue; NI, noninformative; NP, not present; X, presence of X-chromosome-specific PCR product; Y, presence of Y-chromosome-specific PCR product; Ch, chromosome.
