PMID- 28882701 OWN - NLM STAT- MEDLINE DCOM- 20171204 LR - 20211011 IS - 1532-8392 (Electronic) IS - 0046-8177 (Linking) VI - 68 DP - 2017 Oct TI - Diagnostic value of histone 3 mutations in osteoclast-rich bone tumors. PG - 119-127 LID - S0046-8177(17)30316-7 [pii] LID - 10.1016/j.humpath.2017.08.030 [doi] AB - Differentiating osteoclast-rich lesions of bone (giant cell tumor of bone [GCTB], chondroblastoma [CBA], and aneurysmal bone cyst [ABC]) can be challenging, especially in small biopsies or fine-needle aspirations. Mutations affecting codons 34 and 36 of either H3 Histone Family Member 3A (H3F3A) and/or 3B (H3F3B) are characteristically seen in GCTB and CBAs. We devised a simple assay to identify these mutations and evaluated its applicability for routine clinical diagnosis. One hundred twenty-four tissue specimens from 108 patients (43 GCTBs, 38 CBAs and 27 ABCs) were collected from the archives of the Calgary Laboratory Services/University of Calgary and Vanderbilt University Medical Center. Histology was reviewed by an expert orthopedic pathologist. A single base extension assay (SNaPshot) is used to interrogate each nucleotide in codons 34 and 36 of H3F3A and codon 36 of H3F3B. Final diagnoses were generated after re-reviewing cases and incorporating molecular findings. Of 43 GCTBs, 38 (88%) had an H3F3A G34W mutation; 35 of 38 CBAs (92%) had a K36M mutation in either H3F3B (N = 31; 82%) or H3F3A (N = 4; 11%); none of 27 ABCs had a tested mutation. Molecular findings changed the histomorphologic diagnosis in 5 cases (3 GCTB changed to ABC, and 2 ABC changed to GCTB). These findings support the diagnostic utility of mutational analysis for this differential diagnosis in certain challenging cases when clinicoradiologic and histomorphologic features are not definitive, particularly for distinguishing cellular ABC versus GCTB with secondary ABC. CI - Copyright (c) 2017 Elsevier Inc. All rights reserved. FAU - Nohr, Erik AU - Nohr E AD - University of Calgary/Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Calgary, AB, Canada, T2N 2T9. FAU - Lee, Lik Hang AU - Lee LH AD - University of Calgary/Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Calgary, AB, Canada, T2N 2T9. FAU - Cates, Justin M AU - Cates JM AD - Vanderbilt University Medical Center, Department of Pathology, Microbiology and Immunology, Nashville, TN, United States, 37232. FAU - Perizzolo, Marco AU - Perizzolo M AD - University of Calgary/Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Calgary, AB, Canada, T2N 2T9. FAU - Itani, Doha AU - Itani D AD - University of Calgary/Calgary Laboratory Services, Department of Pathology and Laboratory Medicine, Calgary, AB, Canada, T2N 2T9. Electronic address: doha.itani@cls.ab.ca. LA - eng PT - Journal Article PT - Multicenter Study DEP - 20170904 PL - United States TA - Hum Pathol JT - Human pathology JID - 9421547 RN - 0 (Biomarkers, Tumor) RN - 0 (H3-3A protein, human) RN - 0 (Histones) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Alberta MH - Biomarkers, Tumor/*genetics MH - Bone Cysts, Aneurysmal/*genetics/mortality/pathology/therapy MH - Bone Neoplasms/*genetics/mortality/pathology/therapy MH - Child MH - Chondroblastoma/*genetics/mortality/pathology/therapy MH - *DNA Mutational Analysis MH - Diagnosis, Differential MH - Disease-Free Survival MH - Female MH - Genetic Predisposition to Disease MH - Giant Cell Tumor of Bone/*genetics/mortality/pathology/therapy MH - Histones/*genetics MH - Humans MH - Kaplan-Meier Estimate MH - Male MH - Middle Aged MH - *Mutation MH - Osteoclasts/*pathology MH - Phenotype MH - Predictive Value of Tests MH - Tennessee MH - Time Factors MH - Young Adult OTO - NOTNLM OT - Aneurysmal bone cysts OT - Chondroblastoma OT - Giant cell tumor of bone OT - H3F3A OT - H3F3B OT - Point mutation EDAT- 2017/09/09 06:00 MHDA- 2017/12/05 06:00 CRDT- 2017/09/09 06:00 PHST- 2017/02/16 00:00 [received] PHST- 2017/08/10 00:00 [revised] PHST- 2017/08/23 00:00 [accepted] PHST- 2017/09/09 06:00 [pubmed] PHST- 2017/12/05 06:00 [medline] PHST- 2017/09/09 06:00 [entrez] AID - S0046-8177(17)30316-7 [pii] AID - 10.1016/j.humpath.2017.08.030 [doi] PST - ppublish SO - Hum Pathol. 2017 Oct;68:119-127. doi: 10.1016/j.humpath.2017.08.030. Epub 2017 Sep 4.