PTEN-Related Disorders (PTEN) Sequencing
2002722
Ordering Recommendation
Diagnostic testing for PTEN-related disorders.  Predictive testing for PTEN-related disorders.
Mnemonic
PTEN FGS
Methodology
Polymerase Chain Reaction/Sequencing
Performed
Varies
Reported
Within 21 days  
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
  
Collect
Lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B).  
Specimen Preparation
Transport 3 mL whole blood. (Min: 1 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
  
Remarks
  
Stability
Ambient: 72 hours; Refrigerated: 1 week; Frozen: Unacceptable  
Reference Interval
   
Interpretive Data
Background Information for PTEN-Related Disorders (PTEN) Sequencing:
Characteristics of PTEN hamartoma tumor syndrome (PHTS):
Clinical findings are highly variable andinclude Cowden syndrome (CS), Bannayan-Riley-Ruvalcaba syndrome (BRRS), Proteus syndrome (PS) and Proteus-like syndrome (PSL).
CS: Multiple hamartoma syndrome with increased risk for malignant and benign tumors of the breast, thyroid and endometrium. Other associated findings include macrocephaly and mucocutaneous lesions (facial trichilemmomas, palmoplantar keratoses and papillomatous papules).
BRRS: Characterized by macrocephaly, intestinal hamartomatous polyposis, lipomas, hemangiomas and pigmented macules of the glans penis.
PS: A progressive disorder demonstrating mosaic distribution of associated lesions. Findings include hamartomatous tissue overgrowth, hyperostoses, connective tissue and epidermal nevi, dysregulated adipose tissue, vascular malformations and other congenital malformations.
PSL: Describes individuals with significant features of PS who do not meet clinical diagnostic criteria for PS.
Incidence:
At least 1 in 200,000 for CS; PS is rare with approximately 120 reported cases; unknown for other PTEN-associated conditions.
Inheritance:
Autosomal dominant. All mutations causing PS and 50-90 percent causing CS are de novo.
Penetrance:
99 percent by 30 years of age for CS.
Cause:
Pathogenic PTEN gene mutations.
Clinical Sensitivity:
80 percent for CS, 60 percent for BRRS, 50 percent for PSL and 20 percent for PS.
Methodology:
Bidirectional sequencing of the PTEN promoter, coding region and intron-exon boundaries.
Analytical Sensitivity and Specificity:
99 percent.
Limitations
: Diagnostic errors can occur due to rare sequence variations. Some regulatory region mutations, deep intronic mutations, and large deletion/duplications will not be detected.



Counseling and informed consent are recommended for genetic testing. Consent forms are available online at www.aruplab.com.

See Compliance Statement C: www.aruplab.com/CS  
Note
 
CPT Code(s)
81321
Components
Component Test Code*Component Chart Name
2002723PTEN FGS Specimen
2002724PTEN-Related Disorders Interpretation
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Bannayan-Riley-Ruvalcaba Syndrome
  • Cowden Syndrome
  • Proteus Syndrome
  • Proteus-Like Syndrome
  • PTEN Sequencing assay