It is commonly used in medical documents to indicate that a patient or a condition needs to be monitored regularly to assess any changes or developments.

Fibroadenom in obs likely means that the fibroadenoma (a benign breast tumor) is under observation, which implies it is being monitored for any changes in size or characteristics without immediate intervention unless necessary.

...............................................................................................................

It is a typical approach in cases where the condition is not causing immediate harm, and the medical team wants to avoid overtreatment while keeping a close watch on the patient's status.

Here is the reference you may go though it:
https://www.proz.com/kudoz/latin-to-english/medical-general/...