HSA / HepPar 1

Alias/Synonym: Hepatocellular Carcinoma, Germ Cell Tumor

CPT Code: 88342

Specimen Type, Preferred:
Formalin fixed paraffin embedded tissue
Specimen Type, Alternate:
Sample Quantity, Preferred:
1 block
2 slides
Sample Quantity, Minimum:
Transport Container:
Paraffin block
Unstained slides
Transport Temperature:
Room temperature
Collection Instructions:
Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.
Slides should be positively charged and cut at 3-4 microns for each stain/antibody ordered.
Specimen Stability:
Rejection Criteria:
No liquid specimens.
Uncharged slides
Clinical Significance:
Hepatocyte Specific Antigen (aka Hep Par-1, clone OCH1E5) is present in both benign and malignant liver derived tissue. It seems to be associated with hepatocyte mitochondrial membranes, although it may also appear focally in small bowel mucosa. Approximately 70-90% of hepatocellular carcinoma cases are positive, but focal staining may also be seen in GI tract, pancreas, lung and ovary tumors. Hepatoid tumors (e.g. hepatoid yolk sac tumor) can also be positive.
Turnaround Time:
1 day(s)
Reference Ranges: