What does "WO" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
"W/O" in a medical document stands for "without". It is used to indicate that a certain procedure or test was done without the use of something. In the context of an MRI scan, "W/O" could mean that the scan was done without the use of a contrast agent, which is a special dye used to make certain areas of the body show up more clearly on the scan.
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