Navigation Links
Studies Investigate Diagnostic Performance and Reproducibility of Pathwork Diagnostics' Tissue of Origin Test
Date:11/8/2007

SUNNYVALE, Calif., Nov. 8 /PRNewswire/ -- Pathwork Diagnostics, a genomics-based diagnostics company focused on oncology, announced that its Pathwork(TM) Tissue of Origin Test is the focus of two studies featured in poster presentations at this week's 12th Annual Meeting of the Association for Molecular Pathology (November 7-10, Los Angeles). The new genomics-based test is designed to help determine a tumor's origin so that tissue-specific management can begin.

There are an estimated 200,000 cancer patients each year in the United States who may benefit from diagnostic information to determine the tissue of origin for their cancer. One study showed that, in some cases, the primary tumor site is identified only 25 percent of the time using traditional diagnostic tools. National Comprehensive Cancer Network guidelines emphasize the importance of identifying the tissue of origin so that management specific to the primary cancer can begin.

The Pathwork Tissue of Origin Test's proprietary analytics are designed to measure the expression of more than 1600 genes and compare a tumor's genetic "signature" against those of 15 known tissue types. The test uses microarray technology, which enables large numbers of genes to be evaluated at the same time, using the proven, commercially available Affymetrix instrument system.

"This test has the potential to be an effective aid in the diagnosis of cancer patients presenting with poorly differentiated and undifferentiated tumors," concluded Federico Monzon, M.D., Methodist Hospital, Houston, TX, (Poster #ST102, Friday, November 9, 1:00-3:00 PM, Constellation and Olympic Ballroom).

Dr. Monzon's clinical validation study ("Validation of a gene expression-based tissue of origin test applied to poorly differentiated and undifferentiated cancers") evaluated the performance of the Pathwork Tissue of Origin Test in a clinical setting. In the study, specimens of 477 metastatic and poorly differentiated and undifferentiated primary human tumors were obtained. All samples were of known origin (termed reference diagnosis).

Frozen tissue specimens were processed in two laboratories with a recommended protocol for gene expression with the Affymetrix platform. Data were analyzed with the Pathwork Tissue of Origin algorithm and a Tissue of Origin report was generated for each sample. The result was compared to the reference diagnosis to establish the performance characteristics of the Pathwork test. The Tissue of Origin Test results matched the reported origin in 89% of samples tested and provided greater than 92% agreement for at least 8 tissues of origin.

In the second study, Catherine I. Dumur, Ph.D., Virginia Commonwealth University, Richmond, VA, led a group which examined the analytical performance characteristics and reproducibility of the Tissue of Origin Test, "Analytic performance of a microarray-based gene expression test to determine tissue of origin in uncertain primary cancers" (Poster #ST01, Thursday, November 8, 2:30-4:30 PM, Constellation and Olympic Ballroom).

In Dr. Dumur's study, 60 archived tissue specimens from poorly and undifferentiated tumors (metastatic and primary) were analyzed at four laboratories representing a wide range of pre-analytical conditions. Reproducibility was analyzed by cross-wise comparisons of all 4 sites. Cross-laboratory comparisons, performed using a variety of measures, showed highly reproducible results between laboratories. In addition, an average of 93.8% overall concordance between laboratories in terms of final tissue of origin calls was obtained.

"As a result of the study, we concluded that the Pathwork Tissue of Origin Test is a robust assay that produces consistent results in diverse laboratory conditions reflecting the pre-analytical variations found in the everyday clinical practice of molecular diagnostics laboratories," explained Dr. Dumur.

Note: The Pathwork Tissue of Origin Test is not cleared by the FDA for sale in the U.S. It is for Investigational Use Only.

About Pathwork Diagnostics

Pathwork Diagnostics, based in Sunnyvale, California, develops and delivers genomics-based diagnostics that advance cancer care. The company solves unmet clinical needs in oncology by using innovative technology to harness the power of genomics information and apply it in a robust, reproducible and reliable manner. Pathwork Diagnostics plans to deliver FDA-cleared microarray-based diagnostic tests for oncology to the clinical laboratory. The company's initial tests will consist of Pathwork Diagnostics' proprietary analytics and a companion Pathchip(TM) microarray, which runs on the proven Affymetrix instrument system. The company's first test -- the Pathwork(TM) Tissue of Origin Test -- is designed to be an aid in the diagnosis of the tissue of origin in patients with poorly or undifferentiated tumors or metastases.


'/>"/>
SOURCE Pathwork Diagnostics
Copyright©2007 PR Newswire.
All rights reserved

Related medicine news :

1. Gene Studies of Male-Female Differences Often Flawed
2. Two studies published in the Lancet
3. Study of Studies Finds No Risk to Children From Phthalates in Toys
4. Just Completed Studies Reveal Impact of New Medicare Reimbursement Regulations
5. Studies Prove Exercise Can Heal the Body Mind and Soul
6. Studies Shed New Light on Breast Cancer, Treatment
7. Multi-Year Compendium of Pharmaceutical Case Studies Available from Best Practices, LLC
8. Genomic Health Announces Multiple Studies on Oncotype DX(TM) Presented at 2007 American Society of Clinical Oncology (ASCO) Breast Cancer Symposium
9. Best Practice Database: Complimentary Excerpt of Three Sales Force Excellence Studies
10. Major Pharma Clinical Case Studies From Amgen, AstraZeneca, GSK, Intermune, Cephalon Inc, Sunesis Pharmaceuticals and Dartmouth Medical School During Fall Clinical Focused Programs
11. NIH awards Einstein multimillion dollar grant to extend studies of exceptional longevity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/2/2016)... ... May 02, 2016 , ... Beanfields, PBC, makers of Beanfields ... college students at University of Colorado in Boulder to create new advertising campaigns. ... in the School of Journalism, who selected Beanfields as the brand on which ...
(Date:5/2/2016)... ... May 02, 2016 , ... “Engineering Bubbles,” an oil painting submitted by ... Art Forum held recently at the Annual Meeting in Los Angeles. The first annual ... members and Annual Meeting attendees. , “Through art I hope to educate ...
(Date:5/2/2016)... Agoura Hills, CA (PRWEB) , ... May 02, 2016 , ... ... technology to provide his patients with same day treatments. In the past, many necessary ... from school or work, along with multiple anesthetic shots and extra chair time. Not ...
(Date:5/2/2016)... , ... May 02, 2016 , ... This week Omega ... its 2016 guest season which runs through October. Omega is offering a record 370 ... , “There has never been such widespread interest in or need for the ...
(Date:5/2/2016)... ... May 02, 2016 , ... Visceral fat, also known ... the kidneys, liver and pancreas. If not properly addressed, visceral fat can lead ... Internal Medicine, Medical Oncology and Palliative Care, warns against the dangers of visceral ...
Breaking Medicine News(10 mins):
(Date:4/28/2016)... 28, 2016  Marking its one year anniversary ... ovarian cancer risk test, Color Genomics ... that highly impact the most common hereditary cancers ... Color Test analyzes hereditary cancer risks for breast, ... cancers. The Color Test is physician ordered and ...
(Date:4/28/2016)... 2016  The blood testing market in ... Kalorama Information and The Freedonia Group in a recent ... testing.  The healthcare research firm said that ... collection stations and in improving testing at the provincial ... Blood Testing Market in China , ...
(Date:4/28/2016)... -- , Net Sales of $1.90 billion represent an ... year period, and an increase of 1.2% on an adjusted ... the first quarter were $0.52 reported, a decrease of 47.5% ... of 29.9% over the prior year period , The ... 2016 Zimmer Biomet Holdings, Inc. (NYSE and SIX: ...
Breaking Medicine Technology: