Test Method


CPT Code

88342 x 1
88341 x 1

Stains / Test Description

Pulmonary surfactant apoproteins play essential roles in keeping alveoli from collapsing at the end of expiration. SP-A is located mainly in type II pneumocytes and has been demonstrated in bronchiolo-alveolar carcinomas and adenocarcinomas of the lung. Mesotheliomas show no positive staining with this antibody. Surfactant can be helpful in the differential diagnosis of pulmonary adenocarcinomas and mesotheliomas.

Specimen Requirements

(1) H&E slide with formalin-fixed, paraffin-embedded (FFPE) tissue, fixed with 10% NBF.
One (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4 microns) for each test/antibody ordered

Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.

Storage & Transport

Ship specimen same day (whenever possible) with refrigerated (not frozen) cold pack

Turnaround time

1-3 days depending on level of service

Level of Service

Global (with interpretation)
Slide Only (glass slides only)
Web-Enabled (glass and digital images through eCSI portal)