TPPTL - Overview: Tripeptidyl Peptidase 1 (TPP1) and Palmitoyl-Protein Thioesterase 1 (PPT1), Leukocytes

Test Catalog

Test Name

Test ID: TPPTL    
Tripeptidyl Peptidase 1 (TPP1) and Palmitoyl-Protein Thioesterase 1 (PPT1), Leukocytes

Useful For Suggests clinical disorders or settings where the test may be helpful

Evaluation of patients with clinical presentations suggestive of neuronal ceroid lipofuscinoses (NCL)


Aids in the differential diagnosis of infantile and late infantile NCL


This blood test is an appropriate first step for individuals who present between the ages of 0 and 4 with symptoms consistent with neuronal ceroid lipofuscinosis.

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test

Method Name A short description of the method used to perform the test


NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter or abbreviated version of the Published Name for a test; an abbreviated test name

TPP1 and PPT1, WBC

Aliases Lists additional common names for a test, as an aid in searching

Palmitoyl-Protein Thioesterase 1 (PPT1)
TPP1 (Tripeptidyl Peptidase 1)
NCL (Neuronal Ceroid Lipofuscinosis)
Batten disease