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High CA 27-29 (Carbohydrate Antigen) in a blood test

Blood test
High CA 27-29 (Carbohydrate Antigen) in a blood test
Last update: 26/10/2021

What is a high CA 27-29 (Carbohydrate Antigen) in a blood test called?

  • High CA 27-29

What is the normal CA 27-29 (Carbohydrate Antigen) in a blood test?

If you need to know which are the CA 27-29 reference ranges or you require more information about the role of CA 27-29 in the blood, you can visit normal CA 27-29 (Carbohydrate Antigen) in a blood test

What does a high CA 27-29 (Carbohydrate Antigen) mean?

CA 27-29 is a tumor marker used to monitor the progress and treatment of metastatic breast cancer.

An elevation of CA 27-29 antigen in successive blood tests is a sign of a poor prognosis. On the other hand, if there is a decrease the treatment is working.

  • Severe CA 27-29 (Carbohydrate Antigen) increase (> 38 U/ml in adults):

    The level of the CA 27-29 antigen in the blood is very high. The test is usually ordered by a doctor when a patient suffers from breast cancer. It is useful to monitor the progression of the disease.

    However, a high value of CA 27-29 in the blood may be also a sign of other types of malignant cancer or a benign tumor or disease such as breast cysts or ovarian cysts.

    In case of suffering from breast cancer, it is important to know the evolution of CA 27-29 after the treatment. It is necessary to wait two or three months after the start of the treatment to perform a new test because at the beginning the CA 27-29 usually increases. If the CA 27-29 level decreases after three months, the treatment is effective. If it increases, the treatment is not working.

Which factors can raise the CA 27-29 (Carbohydrate Antigen) in a blood test?

There are some health circumstances than can raise the CA 27-29 (Carbohydrate Antigen) in a blood test:

  • Pregnancy

Which diseases can raise your CA 27-29 (Carbohydrate Antigen) in a blood test?

The most common diseases why the CA 27-29 (Carbohydrate Antigen) can be higher than normal are:

  • Ovarian cysts
  • Breast cysts
  • Endometriosis
  • Small-cell lung cancer
  • Large-cell lung cancer

What can I do to lower the CA 27-29 (Carbohydrate Antigen) in a blood test?

CA 27-29 is commonly used as a tumor marker. The best way to reduce the CA 27-29 level in the blood is by treating the underlying cancer disease.

Where can I find more information about CA 27-29 (Carbohydrate Antigen) in a blood test?

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Which values are considered a high CA 27-29 (Carbohydrate Antigen) in a blood test?

The following values are considered to be above the normal range:

IMPORTANT: These levels are expressed in U/ml. They are an example of a healthy adult of about 40 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.

CA 27-29
Severe CA 27-29 increase
39 U/ml40 U/ml41 U/ml42 U/ml43 U/ml44 U/ml45 U/ml46 U/ml
47 U/ml48 U/ml49 U/ml50 U/ml51 U/ml52 U/ml53 U/ml54 U/ml
55 U/ml56 U/ml57 U/ml58 U/ml59 U/ml60 U/ml61 U/ml62 U/ml
63 U/ml64 U/ml65 U/ml66 U/ml67 U/ml68 U/ml69 U/ml70 U/ml
71 U/ml72 U/ml73 U/ml74 U/ml75 U/ml76 U/ml77 U/ml78 U/ml
79 U/ml80 U/ml81 U/ml82 U/ml83 U/ml84 U/ml85 U/ml86 U/ml
87 U/ml88 U/ml89 U/ml90 U/ml91 U/ml92 U/ml93 U/ml94 U/ml
95 U/ml96 U/ml97 U/ml98 U/ml99 U/ml100 U/ml101 U/ml102 U/ml
103 U/ml104 U/ml105 U/ml106 U/ml107 U/ml108 U/ml109 U/ml110 U/ml
111 U/ml112 U/ml113 U/ml114 U/ml115 U/ml116 U/ml117 U/ml118 U/ml
119 U/ml120 U/ml121 U/ml122 U/ml123 U/ml124 U/ml125 U/ml126 U/ml
127 U/ml128 U/ml129 U/ml130 U/ml131 U/ml132 U/ml133 U/ml134 U/ml
135 U/ml136 U/ml137 U/ml138 U/ml139 U/ml140 U/ml141 U/ml142 U/ml
143 U/ml144 U/ml145 U/ml146 U/ml147 U/ml148 U/ml149 U/ml150 U/ml
151 U/ml152 U/ml153 U/ml154 U/ml155 U/ml156 U/ml157 U/ml158 U/ml
159 U/ml160 U/ml161 U/ml162 U/ml163 U/ml164 U/ml165 U/ml166 U/ml
167 U/ml168 U/ml169 U/ml170 U/ml171 U/ml172 U/ml173 U/ml174 U/ml
175 U/ml176 U/ml177 U/ml178 U/ml179 U/ml180 U/ml181 U/ml182 U/ml
183 U/ml184 U/ml185 U/ml186 U/ml187 U/ml188 U/ml189 U/ml190 U/ml
191 U/ml192 U/ml193 U/ml194 U/ml195 U/ml196 U/ml197 U/ml198 U/ml
199 U/ml200 U/ml201 U/ml202 U/ml203 U/ml204 U/ml205 U/ml206 U/ml
207 U/ml208 U/ml209 U/ml210 U/ml211 U/ml212 U/ml213 U/ml214 U/ml
215 U/ml216 U/ml217 U/ml218 U/ml219 U/ml220 U/ml221 U/ml222 U/ml
223 U/ml224 U/ml225 U/ml226 U/ml227 U/ml228 U/ml229 U/ml230 U/ml
231 U/ml232 U/ml233 U/ml234 U/ml235 U/ml236 U/ml237 U/ml238 U/ml
239 U/ml240 U/ml241 U/ml242 U/ml243 U/ml244 U/ml245 U/ml246 U/ml
247 U/ml248 U/ml249 U/ml250 U/ml251 U/ml252 U/ml253 U/ml254 U/ml
255 U/ml256 U/ml257 U/ml258 U/ml259 U/ml260 U/ml261 U/ml262 U/ml
263 U/ml264 U/ml265 U/ml266 U/ml267 U/ml268 U/ml269 U/ml270 U/ml
271 U/ml272 U/ml273 U/ml274 U/ml275 U/ml276 U/ml277 U/ml278 U/ml
279 U/ml280 U/ml281 U/ml282 U/ml283 U/ml284 U/ml285 U/ml286 U/ml
287 U/ml288 U/ml289 U/ml290 U/ml291 U/ml292 U/ml293 U/ml294 U/ml
295 U/ml296 U/ml297 U/ml298 U/ml299 U/ml300 U/ml  
Medically reviewed by our Medical staff on 26/10/2021


  • Laboratory tests and diagnostic procedures : with nursing diagnoses. Jane Vincent Corbett, Angela Denise Banks. 8th ed. 2013. ISBN: 978-0-13-237332-6. Pag. 249.
  • Tietz. Fundamentals of Clinical Chemistry. Carl A. Burtis, Edward R. Ashwood, David e. Bruns. 6th edition. 2008. Pag 354. ISBN: 978-0-7216-3865-2.

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