Stains & molecular markers
Napsin A


Topic Completed: 1 June 2012

Minor changes: 3 September 2020

Copyright: 2002-2020, PathologyOutlines.com, Inc.

PubMed Search: Napsin A

Nat Pernick, M.D.
Page views in 2019: 13,017
Page views in 2020 to date: 13,257
Cite this page: Pernick N. Napsin A. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/stainsnapsina.html. Accessed October 29th, 2020.
Definition / general
  • 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 (Lung Cancer 2012;77:156)
Uses by pathologists
Microscopic (histologic) images

Contributed by Andrey Bychkov, M.D., Ph.D.

Lung ADC



Images hosted on other servers:
Missing Image Missing Image

Lung adenocarcinoma

Missing Image

Cerebellar tumor specimen

Cytology images

Images hosted on other servers:
Missing Image

Pulmonary ADC

Missing Image

Pulmonary SCC

Missing Image

SCC

Missing Image

ADC


Missing Image Missing Image Missing Image

PDC

Positive staining - normal
Positive staining - disease
Electron microscopy images

Images hosted on other servers:
Missing Image

Type II pneumocytes

Back to top
Image 01 Image 02