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Test · Diagnostics

IHC NAPSIN A

Free home sample collection, physician reviewedSubmit Tissue in 10% formal-saline OR formalin fixed paraffin embedded Tissue Block. Ship at room temperature.Reports inBloodSample

Napsin A is an aspartic proteinase involved in the proteolytic processing of surfactant precursors in the normal alveolar epithelium. In normal tissues, napsin A is expressed in the cytoplasm of alveolar macrophages, type II pneumocytes, pancreatic ducts and acini, and in renal tubules. Napsin A has clinical utility for the identification of primary lung adenocarcinomas. Napsin A is also positive in a subset of thyroid and renal cell carcinomas (especially papillary type).

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