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Clear
 
Test Code:
CA199

Order Name:
CA 19-9*

 
Useful For:
Immunoassay for the in vitro quantitative determination of CA 19‑9 in human serum.
 
Methodology:
Electrochemiluminescence method (ECLIA)
 
AliasesName:
Cancer Antigen 19-9
 
 
 
Test Code:
CA199

Order Name:
CA 19-9*

 
Collection Specimen Or Container:
Blood/ Plain Blood (Red Top) 6 mL, 1 tube
 
Specimen Testing Type:
Serum, minimum volume 1 mL
 
Sub Mission Container:
Plastic vial
 
Rejection Criteria:
Hemolysis: 4+ reject
 
Specimen Stabillity:
Specimen Type Temperature Time
Serum (keep in origical tube) Refrigerated, 2oC to 8oC 8 hours
Serum Refrigerated, 2oC to 8oC 30 days
  Frozen, -20oC 3 months
 
 
 
Test Code:
CA199

Order Name:
CA 19-9*

 
Method detail:
Electrochemiluminescence method (ECLIA)
 
Schedule:
Tested daily (24 hours)
 
 
Turnaround Time:
Specimen collected to reported within 2:00 hours (120 mins)
 
 
Performing Location:
Immunology, Laboratory Department Tel. 13227
 
Specimen Retention Time:
5 days
 
 
 
Test Code:
CA199

Order Name:
CA 19-9*

 
 
Clinical Information:
CA 19‑9 assay values can assist in the differential diagnosis and monitoring of patients with pancreatic carcinoma (sensitivity 70‑87 %). There is no correlation between tumor mass and the CA 19‑9 assay values. However, patients with CA 19‑9 serum levels above 10000 U/mL almost always have distal metastasis.

The determination of CA 19‑9 cannot be used for the early detection of pancreatic carcinoma. In hepatobiliary carcinoma the CA 19‑9 values provide a sensitivity of 50‑75 %. The concomitant determination of CA 72‑4 and CEA is recommended in cases of gastric carcinoma. In colorectal carcinoma, determination of CEA alone is adequate; only in rare CEA‑negative cases the determination of CA 19‑9 can be useful.

As the mucin is excreted exclusively via the liver, even slight cholestasis can lead to clearly elevated CA 19‑9 serum levels in some cases. Elevated CA 19‑9 values are also found with a number of benign and inflammatory diseases of the gastrointestinal tract and the liver, as well as in cystic fibrosis.
 
Reference Value:
0-39 U/mL
 
Clinical Reference:
Manufacturer’s Reagent package insert, Elecsys and cobas e analyzers CA 19-9, 2018-01, V.22, Roche Diagnostics GmbH, Sandhofer Strasse 116, D-68305 Mannheim.