Tumor Markers Flashcards
ONCOFETAL ANITGENS (2)
1) Alpha-Feto Protein
2) Carcinoembryonic Antigen
Alpha-Feto prtoein is synthesized by?
Hepatocytes
Helps diagnose and guide the treatment of
Liver cancer
Alpha-Feto protein
Increased in acute and chronic hepatitis
Alpha-Feto protein
Also increased in testicular cancers & rare
types of ovarian cancer, Choriocarcinoma
Alpha-Feto protein
Indication of Hepatic Cancer
> 350 ng/mL
GI tract & pancreas in fetal development
Carcinoembryonic Antigen
Diagnosis/Screen COLORECTAL CANCER
Carcinoembryonic Antigen
Marker of GIT CANCER
Carcinoembryonic Antigen
Increased in heavy smokers
Carcinoembryonic Antigen
ENZYMES (4)
1) Prostate Specific Antigen
2) Lactate dehydrogenase (LDH)
3) Neuron specific Enolase (NSE)
4) Alkaline phosphatase
highly specific for prostate
cancer
Prostate Specific Antigen
Used to test prostatic cancer
Also for multiple myeloma & lung cancer
Prostatic acid phosphatase
Which is better, PAP or PSA?
PSA
Found in all prostate cells
Prostate specific membrane antigen (PSMA)
unlikely
<4ng/ml
gray zone
4-10ng/ml
most likely
> 10ng/ml
Enzyme found in testes
Lactate dehydrogenase
Marker: Testicular Cancer & other germ cell tumors
Lactate dehydrogenase
Used to monitor treatment effect and to watch for recurrence of disease
Lactate dehydrogenase
Marker: NEUROENDOCRINE TUMORS
Neuron specific Enolase (NSE)
For follow up of patients with small cell lung cancer or neuroblastoma
Neuron specific Enolase (NSE)
Abnormal levels of NSE
> 9 ug/mL
Metastatic Cancer of bone, Hepatocellular cancer, Osteosarcoma, Lymphoma, Leukemia
Alkaline phosphatase
CANCER ANTIGENS (6)
1) CA 15-3
2) CA 125
3) CA 19-9
4) CA 27.29
5) CA 72-4
6) CA 50
used for Breast Cancer
CA 15-3
Also elevated in other cancers: Lung, Ovarian,
benign breast conditions
CA 15-3
NV of CA 15-3
<30u/ml
Method used for cancer antigens
Immunoassay
LDH common for healthy individual
LDH 2
LDH for infected individual/disorders
LDH 1
Specimen used for prostatic acid phosphatase
Seminal fluid
standard marker = Epithelial Ovarian cancer
CA 125
Found in most serious endometrioid and clear
carcinomas of the ovary
CA 125