Sign in →

Test Code FBN1 Seq FBN1 Gene Sequencing Test

Clinical System Name

FBN1 Gene Sequencing Test


Marfan syndrome



Mutations in FBN1 can result in several phenotypes, the most frequent of which is Marfan syndrome that is characterized by relative tall stature, arachnodactyly, kyphoscoliosis, chest deformity, lens dislocation and a high risk for aortic aneurysm and dissection. In addition to Marfan syndrome mutations in FBN1 can cause dominantly inherited forms of geleophysic dysplasiaacromicric dysplasiaWeill Marchesani syndrome, and stiff skin syndrome.

Sample Requirements

Whole blood is preferred.


Specimen: Whole Blood

Container(s): Lavender Top/EDTA

Preferred Vol: 5-10 mL

Minimum Vol: 3 mL


Specimen: DNA

Container(s): Sterile plastic tube

Preferred Vol: 15 µg DNA at a minimum concentration of ≥200 ng/µl

Minimum Vol:


Oragene Saliva samples are accepted

Processing Instructions

Reject due to:

Spin: N

Aliquot: N

Temp: 2-8 C

Storage location: Place whole blood in CPA refrigerator send-outs rack. Store extra labels in the clear plastic box attached to CPA refrigerator.


Notes: Do NOT send specimens for weekend or U.S. holiday delivery


Off-site collection: Send whole blood refrigerated.


Specimen Type Temperature Time
Whole blood Room temp 3 d
Whole blood Refrigerated 7 d
Whole blood Frozen N
Extracted DNA Room temp 3-4 d
Extracted DNA Refrigerated 1 y
Extracted DNA Frozen Indefinitely



N 4-6 w


Performing Laboratory

Collagen Diagnostic Laboratory/Center For Precision Diagnostics



1959 NE Pacific St., HSC H-458
Seattle, WA 98195
FAX: 206.221.7509


Main Phone Number: 206-543-0459

Genetic Counselor: 206-543-5464

Fax: 206-616-1899

Reference Range

Interpretive report is provided.


Method: Next Generation Sequencing. All nucleotides in the coding exons and their flanking splice junctions are sequenced to a read coverage of greater than 20X. 


Limitations: Does not detect deletions/duplications

Clinical Utility

Marfan syndrome is a clinical diagnosis based on family history and the observation of characteristic findings in multiple organ systems. Molecular testing is useful in cases of unclear clinical diagnosis or to distinguish between syndromes with overlapping features.


GeneReviews: Marfan Syndrome

Familial aneurysm syndrome test guide

Send Out Instructions

Reference Test Name: FBN1gDNA Testing
Reference Test Number: Not provided

Send to: Peter Byers MD, Department of Pathology, Room D-518, University of Washington Medical Center, 1959 NE Pacific Street, Seattle, WA 98195-7110. Phone: (206) 543-0459. Or send with the UW/HMC courier, Mon - Fri at 0900 and 1600.


UW Collagen Diagnostic Lab does not accept Holiday or weekend delivery