NUT Rearrangement is Uncommon in Human Thymic Epithelial Tumors

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NUT Rearrangement is Uncommon in Human Thymic Epithelial Tumors Iacopo Petrini, MD, Christopher A. French, MD, Arun Rajan, MD, Michael J. Cameron, MSC,
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NUT Rearrangement is Uncommon in Human Thymic Epithelial Tumors Iacopo Petrini, MD, Christopher A. French, MD, Arun Rajan, MD, Michael J. Cameron, MSC, Elaine S. Jaffe, MD, Paolo A. Zucali, MD, Jianwu Xie, MD, PhD, Yisong Wang, PhD, Giuseppe Giaccone, MD, PhD  Journal of Thoracic Oncology  Volume 7, Issue 4, Pages 744-750 (April 2012) DOI: 10.1097/JTO.0b013e3182460f8f Copyright © 2012 International Association for the Study of Lung Cancer Terms and Conditions

Figure 1 NUT in thymic carcinoma. A, Survival analysis of thymic carcinoma patients. Left, Overall survival curve of thymic carcinoma patients (median: 48 months). Middle, Overall survival by differentiation status. Right, Overall survival by metastasis status. Survival curves were generated using the Kaplan-Meier method. Met, metastasis; Nonmet, nonmetastasis; Diff, differentiated; Undiff, undifferentiated. B, Computed tomography of the thymic carcinoma patient with NUT rearrangement: left supraclavicular lymph nodes, primary bulky mediastinal mass, and para-aortic lymph nodes. C, NUT immunohistochemistry. NUT-positive (left) and -negative (right) thymic carcinomas. Note that in the thymic carcinoma with NUT rearrangement, the speckled NUT expression was mainly restricted in the undifferentiated cell nuclei and much less NUT was in the differentiated squamous cell area. D, NUT gene rearrangement in a thymic carcinoma. Dual-color split-apart fluorescence in situ hybridization was performed with probes flanking 5' centromeric (red) and 3' telomeric (green) of NUT, BRD3, and BRD4, respectively, as described previously.21 Arrows (left panel) marked split-apart NUT signals (red/green signals were split apart due to NUT rearrangement), whereas no BRD3 (not shown) or BRD4 split-apart signal (right panel) was detected in the same tumor sample, indicating that the NUT rearrangement did not involve BRD3/4. Journal of Thoracic Oncology 2012 7, 744-750DOI: (10.1097/JTO.0b013e3182460f8f) Copyright © 2012 International Association for the Study of Lung Cancer Terms and Conditions

Figure 2 Thymic carcinoma with a basaloid component. A, Mediastinal tumor cells with NUT rearrangement infiltrate in the fibrous stroma. Keratinization is seen (H&E; ×200). B, Keratin immunohistochemistry. Tumor cells are strongly and uniformly positive (AE1/AE3 immunostain; ×200). C, p63 shows positive staining mainly in the basaloid component (p63;×200). D, Epithelial cells also express CD5 (CD5; ×200). Journal of Thoracic Oncology 2012 7, 744-750DOI: (10.1097/JTO.0b013e3182460f8f) Copyright © 2012 International Association for the Study of Lung Cancer Terms and Conditions