Medical Abbreviation
CA
CA is a medical abbreviation with more than one meaning — most commonly Cancer / Calcium. Its meaning depends on the clinical context.
What does CA mean?
| Meaning | Context | Field |
|---|---|---|
| Cancer (carcinoma) | Oncology | Oncology |
| Calcium | Lab values and biochemistry | Biochemistry |
| Cardiac arrest | Emergency | Emergency |
Why it matters
Ca with a lower-case a often means calcium (the element), while CA may mean cancer. Capitalisation matters, and cardiac arrest is another emergency meaning.
Frequently asked questions
Does CA mean cancer or calcium?
Both. CA often means cancer (carcinoma); Ca commonly means calcium. Capitalisation and context distinguish them.
Related abbreviations
Study reference only — not medical advice. Always consult qualified sources and supervisors for clinical decisions.