Napsin-A
Methodology
Immunohistochemistry (IHC)
Test Description and clinical significance
Disease:
Distinguish adenocarcinomas from other forms of lung cancer.
A novel aspartic proteinase of the pepsin family involved in the maturation of surfactant protein B
Found primarily in lung and kidney
Lack of Napsin A expression in tumor cells may be poor prognostic marker in pulmonary adenocarcinoma
Specimen Requirements
Collection:
FFPE/un-stained slides/Fresh tissue in formalin
Stability:
Room temperature
Unacceptable Conditions:
Unlabeled specimen/specimen left unfixed
for extended periods
Storage & Transport
Room Temperature
CPT(s)
88342 if intial single stain or 88341 for each additional stain Napsin
New York Approved
NO
TAT
1 Day
*The CPT codes provided are for informational purposes only and are based on AMA guidelines The billing party is solely responsible for correct CPT coding.
