PMID- 34074652 OWN - NLM STAT- MEDLINE DCOM- 20220104 LR - 20220301 IS - 2373-2873 (Electronic) IS - 2373-2873 (Linking) VI - 7 IP - 4 DP - 2021 Aug TI - Twists and turns from "tumor in tumor" profiling: surveillance of chronic lymphocytic leukemia (CLL) leads to detection of a lung adenocarcinoma, whose genomic characterization alters the original hematologic diagnosis. LID - 10.1101/mcs.a006089 [doi] LID - a006089 AB - Comprehensive characterization of somatic genomic alterations has led to fundamental shifts in our understanding of tumor biology. In clinical practice, these studies can lead to modifications of diagnosis and/or specific treatment implications, fulfilling the promise of personalized medicine. Herein, we describe a 78-yr-old woman under surveillance for long-standing untreated chronic lymphocytic leukemia (CLL). Molecular studies from a peripheral blood specimen revealed a TP53 p.V157F mutation, whereas karyotype and fluorescence in situ hybridization (FISH) identified a 17p deletion, trisomy 12, and no evidence of IGH-CCND1 rearrangement. Positron emission tomography-computed tomography scan identified multistation intra-abdominal lymphadenopathy and a pulmonary nodule, and subsequent pulmonary wedge resection confirmed the presence of a concurrent lung adenocarcinoma. Targeted next-generation sequencing of the lung tumor identified an EGFR in-frame exon 19 deletion, two TP53 mutations (p.P152Q, p.V157F), and, unexpectedly, a IGH-CCND1 rearrangement. Follow-up immunohistochemistry (IHC) studies demonstrated a cyclin D1-positive lymphoid aggregate within the lung adenocarcinoma. The presence of the TP53 p.V157F mutation in the lung resection, detection of an IGH-CCND1 rearrangement, and cyclin D1 positivity by IHC led to revision of the patient's hematologic diagnosis and confirmed the extranodal presence of mantle cell lymphoma within the lung mass, thus representing a "tumor in tumor." Manual review of the sequencing data suggested the IGH-CCND1 rearrangement occurred via an insertional event, whose size precluded detection by original FISH studies. Thus, routine imaging for this patient's known hematologic malignancy led to detection of an unexpected solid tumor, whose subsequent precision medicine studies in the solid tumor redefined the original hematological diagnosis. CI - (c) 2021 Terraf et al.; Published by Cold Spring Harbor Laboratory Press. FAU - Terraf, Panieh AU - Terraf P AD - Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA. FAU - Sholl, Lynette M AU - Sholl LM AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Davids, Matthew S AU - Davids MS AD - Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, USA. FAU - Awad, Mark M AU - Awad MM AD - Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, USA. FAU - Garcia, Elizabeth P AU - Garcia EP AD - Center for Advanced Molecular Diagnostics, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - MacConaill, Laura E AU - MacConaill LE AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Dal Cin, Paola AU - Dal Cin P AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Kim, Annette AU - Kim A AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Lindeman, Neal I AU - Lindeman NI AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Stachler, Matthew AU - Stachler M AD - Department of Pathology, University of California San Francisco, San Francisco, California 94143, USA. FAU - Hwang, David H AU - Hwang DH AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. FAU - Dubuc, Adrian M AU - Dubuc AM AD - Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA. LA - eng GR - P30 CA008748/CA/NCI NIH HHS/United States PT - Case Reports PT - Journal Article DEP - 20210802 PL - United States TA - Cold Spring Harb Mol Case Stud JT - Cold Spring Harbor molecular case studies JID - 101660017 RN - 0 (Biomarkers, Tumor) SB - IM MH - Adenocarcinoma of Lung/*diagnosis/genetics MH - Aged MH - Biomarkers, Tumor/genetics MH - Diagnostic Errors MH - Female MH - Gene Expression Profiling MH - Gene Rearrangement MH - High-Throughput Nucleotide Sequencing MH - Humans MH - In Situ Hybridization, Fluorescence MH - Leukemia, Lymphocytic, Chronic, B-Cell/*diagnosis/genetics MH - Lung Neoplasms/*diagnosis/genetics MH - Lymphoma, Mantle-Cell/*diagnosis/genetics MH - Neoplasms, Multiple Primary/*diagnosis/genetics MH - Positron Emission Tomography Computed Tomography PMC - PMC8327883 OTO - NOTNLM OT - chronic lymphatic leukemia OT - hematological neoplasm OT - lung adenocarcinoma EDAT- 2021/06/03 06:00 MHDA- 2022/01/05 06:00 PMCR- 2021/08/01 CRDT- 2021/06/02 05:56 PHST- 2021/02/22 00:00 [received] PHST- 2021/05/03 00:00 [accepted] PHST- 2021/06/03 06:00 [pubmed] PHST- 2022/01/05 06:00 [medline] PHST- 2021/06/02 05:56 [entrez] PHST- 2021/08/01 00:00 [pmc-release] AID - mcs.a006089 [pii] AID - 10.1101/mcs.a006089 [doi] PST - epublish SO - Cold Spring Harb Mol Case Stud. 2021 Aug 2;7(4):a006089. doi: 10.1101/mcs.a006089. Print 2021 Aug.