Methodology
Immunohistochemistry (IHC)
Test Description
p57 (Kip 2, CDKN 1C) is an inhibitor of several G1 cyclin complexes and is a negative regulator of cell proliferation. The gene encoding human p57 is located on chromosome 11p15.5, a region implicated in both sporadic cancers, Wilm's tumor, and Beckwith Wiedemann syndrome (BWS, a cancer syndrome) making it a tumor suppressor candidate. p57 is useful in differentiating between complete hydatidiform mole (no nuclear p57 expression) and partial hydatidiform mole or spontaneous abortion (normal expression).
Specimen Requirements
- A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type
or - One (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4-5 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 & Transportation
Use cold pack for transport. Make sure cold pack is not in direct contact with specimen.
CPT Code(s)*
88342 x 1 or 88341 x 1
Turnaround Time
24 hours
Level of Service
Stain Only
New York Approved
Yes