News and Events

YJ Liu, director of Clinical Genomics Laboratory, presents at 2022 Association for Molecular Pathology Annual Meeting

Yajuan J. Liu, PhD, director of Clinical Genomics Laboratory, is presenting two posters at the 2022 Association for Molecular Pathology Annual Meeting being held Nov 1-5 in Phoenix, AZ.  The work was done in collaboration with colleagues in the University of Washington and other institutions.  Dr. Liu is presenting preliminary evaluation of Hi-C as a method to detect constitutional structural variants, both balanced and unbalanced.  She also describes a complex chromosomal rearrangement found in a family with multisystem anomalies and all the methods used to characterize the rearrangements.

COVID-19 Update: Laboratory OPEN

We are not anticipating any closure of our laboratory at this time.  We will continue to accept samples for testing, inquiries by phone and email, and will issue results as available.  Thank you.


CDL tests for gene panels and single genes now include both sequence analysis and deletion/duplication analysis by next-generation sequencing (NGS) technology. There will be no extra charge for del/dup analysis, and the prices currently shown for sequence analysis apply.

Splicing analysis clinically available

It is now clear that missense and synonymous variants within exons and some intronic variants can affect pre-mRNA splicing. While predictive programs can identify alterations in splice enhancers and suppressors and creation or deletion of recognition sequences, they are poor at determining if they are used.  Additionally, it is difficult to determine the splice outcomes of variants identified by genomic sequencing.  The CDL now offers mRNA splicing studies of genes that are included in our test menu and are expressed in dermal fibroblasts.

Stickler syndrome testing now available through CDL

The Collagen Diagnostic Laboratory is pleased to announce new testing for Stickler syndrome, a connective tissue disorder involving collagen types II, IX, and XII.  The CDL offers a 6 gene panel to test for Stickler syndrome.  Please see the Stickler Syndrome Test Page for more information.

New billing information on Test Requisition Form

The billing portion of the CDL and NCGL laboratory test requisition forms has been revised to include patient consent when billing insurance.  A patient signature is now required for all insurance billing.  Additional security features have also been added to protect credit card information.  Please see the CDL Billing Page or NCGL Billing Page for details!

Clinical Genomics Laboratory launches FusionPlex® Panel

Solid tumors (e.g. sarcomas, lung cancers, thyroid cancers, head and neck cancers, renal cell carcinomas, mammary gland tumors, prostate cancers, brain tumors) frequently have chromosome rearrangements and gene fusions that are important in establishing a diagnosis, predicting prognosis, and guiding therapy choices.  The CGL now offers FusionPlex®, which is based on next generation sequencing of RNA (cDNA) from solid tumor tissue to detect somatic oncogenic gene fusions involving any of 100 genes associated with solid tumors, without prior knowledge of the fusion partners or the breakpoints of the translocations.  More details can be found HERE.

Droplet digital PCR (ddPCR) added to the Clinical Genomics Lab test menu

The Clinical Genomics Lab now offers droplet digital PCR as a test option.  ddPCR is a less expensive way of testing family members for small genomic deletions and duplications that were first detected by chromosomal SNP microarray.  ddPCR also offers a way to do targeted testing for the deletion or duplication of interest.  This avoids the possibility of incidental findings.  More details can be found HERE.

YJ Liu, director of Clinical Genomics Laboratory, recently published papers using Fusionplex RNA seq in cancers

Yajuan J. Liu, PhD, director of Clinical Genomics Laboratory, has published papers recently using Fusionplex RNA-seq in various cancers. The works were done in collaboration with colleagues in the University of Washington and other institutions.

  • Mantilla JG, Ricciotti RW, Chen E, Hoch BL, Liu YJ. Detecting disease-defining gene fusions in unclassified round cell sarcomas using anchored multiplex PCR/targeted RNA next-generation sequencing-Molecular and clinicopathological characterization of 16 cases. Genes Chromosomes Cancer. 2019 Oct;58(10):713-722.  PubMed PMID: 31033080.
  • Tretiakova MS, Wang W, Wu Y, Tykodi SS, True L, and Liu YJ. Detection and Discovery of Translocations in Renal Cell Carcinoma by Fusionplex RNA Sequencing and Correlations of Molecular Findings with Clinicopathological Features. Genes Chromosomes Cancer. 2019 Aug 10. doi: 10.1002/gcc.22798. [Epub ahead of print] PubMed PMID: 31400230.
  • Pattwell SS, Konnick EQ, Liu YJ, Yoda RA, Sekhar LN, Cimino PJ. Neurotrophic Receptor Tyrosine Kinase 2 (NTRK2) Alterations in Low-Grade Gliomas: Report of a Novel Gene Fusion Partner in a Pilocytic Astrocytoma and Review of the Literature. Case Rep Pathol. 2020 Jan 30;2020:5903863. doi: 10.1155/2020/5903863. eCollection 2020. PubMed PMID: 32082673; PubMed Central PMCID: PMC7013287.
  • Davis JL, Vargas SO, Rudzinski ER, López Marti JM, Janeway K, Forrest S, Winsnes K, Pinto N, Yang SE, VanSandt M, Boyd TK, Corless CL, Liu YJ, Surrey LF,  Harris MH, Church A, Al-Ibraheemi A. Recurrent RET Gene Fusions in Pediatric Spindle Mesenchymal Neoplasms. Histopathology. 2020 Jun;76(7):1032-1041. doi: 10.1111/his.14082. Epub 2020 May 15. PMID: 31994201.
  • Han L, Liu YJ, Ricciotti RW, Mantilla JG. A novel MBTD1-PHF1 gene fusion in endometrial stromal sarcoma: A case report and literature review. Genes Chromosomes Cancer. 2020 Jul;59(7):428-432. doi: 10.1002/gcc.22845. Epub 2020 Apr 15. PMID: 32237188.
  • Kuroda N, Trpkov K, Gao Y, Tretiakova M, Liu YJ, Ulamec M, Takeuchi K, Agaimy A, Przybycin C, Magi-Galluzzi C, Fushimi S, Kojima F, Sibony M, Hang JF, Pan CC, Yilmaz A, Siadat F, Sugawara E, Just PA, Ptakova N, Hes O. ALK rearranged renal cell carcinoma (ALK-RCC): a multi-institutional study of twelve cases with identification of novel partner genes CLIP1, KIF5B and KIAA1217. Mod Pathol. 2020 May 28. doi: 10.1038/s41379-020-0578-0. Epub ahead of print. PMID: 32467651.
  • Mantilla JG, Gross JM, Liu YJ, Hoch BL, Ricciotti RW. Characterization of novel USP6 gene rearrangements in a subset of so-called cellular fibroma of tendon sheath. Mod Pathol. 2020 Jul 13. doi: 10.1038/s41379-020-0621-1. Epub ahead of print. PMID: 32661296.
  • Michal M, Rubin BP, Agaimy A, Kosemehmetoglu K, Rudzinski ER, Linos K, John I, Gatalica Z, Davis JL, Liu YJ, McKenney JK, Billings SD, Švajdler M, Koshyk O, Kinkor Z, Michalová K, Kalmykova AV, Yusufli Z, Ptáková N, Hájková V, Grossman P, Šteiner P, Michal M. EWSR1-PATZ1nged sarcoma: a report of nine cases of spindle and round cell neoplasms with predilection for thoracoabdominal soft tissues and frequent expression of neural and skeletal muscle markers. Mod Pathol. 2020 Oct 4. doi: 10.1038/s41379-020-00684-8. Epub ahead of print. PMID: 33012788.
  • Mantilla JG, Cheung H, Ha AS, Hoch BL, Liu YJ, Ricciotti RW. Spindle cell neoplasm with EML4-ALK gene fusion presenting as an intraosseous vertebral mass. Genes Chromosomes Cancer. 2021 Apr;60(4):282-286. doi: 10.1002/gcc.22917. Epub 2020 Nov 19. PMID: 33170538.
  • Liu YJ, Wang W, Yeh J, Wu Y, Mantilla JG, Fletcher CDM, Ricciotti RW, Chen EY. Calcified chondroid mesenchymal neoplasms with FN1-receptor tyrosine kinase gene fusions including FGFR2, FGFR1, MERTK, NTRK1, and TEK: a molecular and clinicopathologic analysis. Mod Pathol. 2021 Mar 16. doi: 10.1038/s41379-021-00786-x. Epub ahead of print. PMID: 33727696.
  • Liu YJ, Wagner MJ, Kim EY, and Chen EY. TUBA1A-GLI1 fusion in a soft tissue myoepithelial neoplasm. Hum Pathol. 2021 March; In press. [Epub ahead of print]
  • Penning AJ, Al-Ibraheemi A, Michal M, Larsen BT, Cho SJ, Lockwood CM, Paulson VA, Liu YJ, Plank L, Fritchie K, Beadling C, Neff TL, Corless CL, Rudzinski ER, Davis JL. Novel BRAF gene fusions and activating point mutations in spindle cell sarcomas with histologic overlap with infantile fibrosarcoma. Mod Pathol. 2021 Apr 13. Epub ahead of print. PMID: 33850302.
  • Tan SY, Al-Ibraheemi A, Ahrens WA, Oesterheld JE, Fanburg-Smith JC, Liu YJ, Spunt SL, Rudzinski ER, Coffin C, Davis JL. ALK rearrangements in infantile fibrosarcoma-like spindle cell tumours of soft tissue and kidney. Histopathology. 2022 Mar;80(4):698-707. doi: 10.1111/his.14603. Epub 2022 Jan 2. PMID: 34843129.

5 New NGS Panels from the Collagen Diagnostic Laboratory

The CDL is pleased to announce the addition of five new NextGen panels, including our most comprehensive panel for Osteogenesis Imperfecta to date, the 30-gene OI and Genetic Bone Disorders Panel.  The CDL offers new testing for Osteopetrosis, Cutis Laxa, Ectopia lentis, and Complex EDS-like Disorders.  As always, the CDL is committed to providing the most comprehensive analysis, interpretation and follow-up of these genes and all genes involved in inherited disorders of connective tissue.

Dr. Peter Byers To Speak At Upcoming ACMG Annual Meeting

Dr. Peter Byers, Director of the UW Medicine Center for Precision Diagnostics, will be presenting at the upcoming ACMG Annual Clinical Genetics Meeting in Phoenix, Arizona.
Topic: What Every Clinical Geneticist Should Know About Testing for Osteogenesis Imperfecta in Suspected Child Abuse Cases
Date: Friday, March 24, 2017
Time: 1:40 PM – 2:00 PM
Location: Phoenix Convention Center
Room: North Ballroom BC
For more information, please visit the conference page HERE

Each year in the UW some 25,000 children between the ages of birth and 3years are abused in ways that result in fractures.  In that same age group are about 1200 infants and children with osteogenesis imperfecta (OI) and a smaller number with other genetic predispositions to bone fragility and fracture.  The presentation of fracture in children with OI may mimic that of children who have been abused in that multiple unexplained fractures can be present and baffle both the parents and the clinicians as to their origin.  More than 90% of individuals with OI have mutations in the type I collagen genes (COL1A1 and COL1A2) and all but a handful of the rest have mutations in any of an additional 15 genes.  Mutations in all these genes can now be reliably identified by genetic sequence analysis, which has completely supplanted analysis of proteins produced by cultured fibroblasts for diagnosis.  The decision of which children to study in the context of concerns about abuse is difficult and even the most stringent procedures to screen out children with OI still leaves questions in a small number among whom about 5% have genetic and biochemical evidence of OI upon testing.  In that context the failure to find a causative genetic alteration, .however, dramatically lowers the likelihood that a child has OI and facilitates further assessment of the family.



Testing for Periodontal Ehlers-Danlos Syndrome

The Center for Precision Diagnostics, Collagen Diagnostic Laboratory is pleased to announce that genetic testing for Ehlers-Danlos syndrome (EDS) periodontal type is now available individually and through our new Comprehensive EDS Panel. The testing for EDS periodontal type (also known as EDS type VIII) includes genomic sequence analysis of C1S and C1R.  Researchers in our group recently described pathogenic variants in these two genes as the underlying cause of EDS VIII.  This autosomal dominant disorder is characterized by early-onset periodontitis and tooth loss.

The genetic cause of periodontal Ehlers-Danlos syndrome (EDS type VIII) found by UWCPD researchers

The Center for Precision Diagnostics researchers, in collaboration with Austrian, Swedish and UK geneticists, recently identified that the cause of the periodontal form of Ehlers-Danlos syndrome (EDS type VIII) results from a mutation in one of an unexpected pair of genes, C1S  or C1R.    Both genes dictate the synthesis of complement, a protein that plays a role in fighting infection and moving foreign cells out the cell.  Most other forms of EDS are caused by sequence variants in collagen proteins.  A C1S or C1R gene sequence abnormality leads to a dominant form of EDS type VIII , causing aggressive periodontitis and tooth loss at a young age.   The surprising discovery accomplished by exome sequencing research is opening the door to learn how the disease progresses, a necessary step for considering treatment.  Read the details of the research in the American Journal of Human Genetics.

Insurance Pre-Authorization Service

The CPDx recognizes that obtaining insurance pre-authorization for genetic testing may be challenging and time consuming.  We are happy to assist clients in obtaining prior authorizations to determine whether genetic testing will be a covered service under the patient’s plan.  Contact our pre-authorization specialists at with any questions.



Byers & Pepin Present At EDS Symposium

Center for Precision Diagnostics laboratory director, Dr. Peter Byers and genetic counselor, Melanie Pepin recently attended the Ehlers-Danlos Society (EDS) International Symposium 2016 in New York City (May 3-6, 2016). Invited members of the EDS medical community and interested affected individuals and family members from around the world gathered to update and expand present clinical diagnostic categories and nomenclature for the many forms of EDS. Both Dr. Byers and Melanie presented clinical data gathered from research participants in the Collagen Diagnostic Research Repository.