Figure 3

A malignant solitary fibrous tumor (a1) with preserved ATRX (a2) and DAXX (a3) expression negative for alternative lengthening of telomeres phenotype (a4). A poorly differentiated synovial sarcoma (b1) with preserved ATRX (b2) and DAXX (b3) expression negative for alternative lengthening of telomeres phenotype (b4). A dermatofibrosarcoma protuberans (c1) with preserved ATRX (c2) and DAXX (c3) expression negative for alternative lengthening of telomeres phenotype (c4). a1, b1, and c1: hematoxylin and eosin stain; a4, b4, and c4: telomere fluorescence in situ hybridization. Original magnification: a1–a3, b1–b3, and c1–c3: × 200; a4, b4, and c4: × 1000.