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An endometrial carcinoma with deletion of PTEN and duplication of the second allele (case 14). A, SNPA image showing one PTEN allele deleted and the second allele duplicated. B, MLPA with normal PTEN status in tumour tissue (T) as compared with normal tissue control (N). C, FISH image showing cells with two copies of PTEN. D, Negative immunostaining for PTEN.
